Normally we'd just send out a tweet about this (that's usually what we do with free app deals, so if you're not one of the almost 40,000 people following us yet, you definitely should be), but this is a good one, and it's a holiday, so we wanted to make sure you knew. Sega is feeling particularly generous this weekend, so they're giving away free copies of their Columns Deluxe, a port of the old Genesis game, for the iPhone. The game is a pretty straightforward port -- it doesn't have any extras, and the accelerometer controls are a little tacked on from what we hear, but if you like the puzzler gameplay of Columns, and you should, it's a fun one to pull up for a few minutes at a time.

Plus, it's free -- from July 3rd to Monday, July 6th, Sega says it'll be on sale for the low price of nothing at all. Sounds good to us -- sit back, put a few brats and burgers on the grill, grab a Corona (and lime, of course), and enjoy some old-school dropping block gameplay for no money at all.

Just in case you haven't yet heard, ngmoco has released Rolando 2 out into the App Store for the premium price of $9.99. The game's subtitled Quest for the Golden Orchid (in this one, you're rescuing a relic rather than a prince), and though it's not cheap by App Store standards, but on the other hand, it's as quality a game as you'll find on the iPhone. We were big fans of the first one, and the second one ups the ante with a brand new 3D look (though still the same great 2D gameplay), and lots more types of Rolandos to roll and jump and fly and drive around the more than 45 new levels. It's fair to say that if you liked the first one, you'll love this one, and if you've never tried rolling a Rolando around, this is a perfect opportunity to start.

There, unfortunately, no lite version of the second game yet, but there is a version of the first one to try, and there are lots of movies to watch over on ngmoco's site, so you can probably get the idea from there. If you're interested in gaming on the iPhone at all, Rolando's on the short list no matter what your tastes are.

We're back with another edition of Ask TUAW. This time around we've answering questions about iTunes libraries, Mac data recovery, Snow Leopard on older Macs and more.

As always, your suggestions and questions are welcome. Questions for next week should be left in the comments. When asking a question please include which machine you're running and which version of Mac OS X (we'll assume you're running Leopard on an Intel Mac if you don't specify). And now, on to the questions.

Daneel asks:

I'm running OS X 10.5.7 and Windows Vista (via Bootcamp) on my iMac 24". I was wondering if there was any way in which I could make the iTunes apps in both Windows and Mac use the same iTunes library. File access is not a problem as I've got the ntfs-3g driver on the mac side and mac drive on the PC side.

I have my iTunes library on an external hard drive. To make iTunes use this particular folder, I create an alias of the folder on the external drive and replace my iTunes folder located in Users> "User Name" > Music with the alias. iTunes has no problem with this setup.

You should be able to do the same thing in both the Mac and Windows versions of iTunes. Just set an alias of the iTunes folder you want to use in Windows pointing to your Mac iTunes library and you should be good to go.

Master Jumperton is a simple game where you swipe to create platforms for Master Jumperton to continually jump higher and higher. There are some similar games on the store, but Jumperton is well-crafted and features a high scores board and basic options. Master Jumperton isn't yet available on the store.

The Battle of Pirate Bay will be available July 1, we are told, and it's a more involved game. That isn't to say it is complicated, as anyone familiar with Flight Control or Harbor Master's game mechanic will understand what to do. Battle goes one step beyond time and path management to add the element of battle with waves of enemies. You have to balance ammo and the health of your base in the bay plus the routing of faster or slower ships with different capabilities all while moving your finger around to direct traffic, as it were. Very fast-paced, and it looks like a lot of fun. We'll tweet when it lands in the store this week.

Both games are from veteran mobile developers Muteki, who developed Maze Finger and Topple 2 for ngmoco. Topple 2 won an Apple design award at this year's WWDC.

We covered Jason Rohrer's Primrose when it first came out -- the creator of Passage, a critically-acclaimed indie game, had taken his first steps onto the iPhone with an abstract puzzle game, and in this latest interview with Edge, Rohrer says he's on the iPhone to stay. He says that when he first moved from strictly art/indie games to more commercial development on the iPhone, he worried that he was selling out: he wasn't a fan of cell phones at all or any Chinese-made gadgets sold by American companies, and yet the iPhone's platform seemed most "palatable" to him in terms of making games and a little money from them.

And yet he says the iPhone still has pros and cons -- even in an "open source, free software" world, Apple's system offers a choice: you can buy a packaged-up version of the software and throw a little money back to the developer (not a ton -- he says you've still got a better chance at making a living from Vegas than you do from the App Store), or you can still try building and installing your own version on your iPhone. As an open-source developer selling apps on the App Store, he says, "you're charging for the service and convenience, not the content."

Still, he echoes the sentiments of lots of other developers: "There is no quality filter, except for the whims of the masses." Apple's App Store offers up an intriguing system for many indie developers like Rohrer, who want to earn a little money for their games without setting up all of the complexity and burdens of a more traditional publishing channel, but it's still tough to keep from getting lost in the mix.

Gizmodo recently posted this video, which is beautiful to any PSX-era gamers: it's Final Fantasy VII running right on the iPhone, like buttah thanks to the 3GS hardware. How is this possible? Through the magic of emulation -- ever since computers got powerful enough to pretend to be other computers, people have resurrected old consoles and hardware by writing code that makes old games and software think its right at home in the computer it belongs in (an old NES system, a Genesis, or even a Playstation or Nintendo 64). As a result, by loading up ROMs into an emulator program, you can play old games you can't find (at least working) in the store any more.

But the problem, as it usually does, lies in the legality. Even though those games are hard to find, companies still often own the copyrights on them (Square, for example, just released FFVII in an official emulator on the PSP, and they wouldn't be very happy with someone else releasing it on the iPhone). So while it's very easy for someone to write software that pretends to be an old NES (and there are lots of jailbroken apps around that will do just that), it's not easy to get all the rights and legal sign-offs to make it legit. Legit enough for Apple to keep it in the App Store, anyway. And while the video Gizmodo shows is awesome, and is possible on a jailbroken phone, it's not likely we'll ever see that app make it through Apple's approval. Not to mention that even when people jump through the legal hoops, Apple isn't happy with running other systems' code on their hardware anyway. Lame.

That doesn't mean that the old games are gone forever -- there are certainly emulators of open-sourced or expired hardware on the App Store (here's one for Chip-8), and obviously there's a commercial reason for companies who do own the copyrights on popular games to bring them into the App Store officially. But as great as it would be to have a GBA emulator that automatically played any GBA game ROMs you loaded into it, that kind of stuff will have to stay in the jailbreak underground for now.

I shot some video of a preview build for Harbor Master back at WWDC, and I'll upload that to our Facebook page later, but I also shot a quick video of Harbor Master's gameplay (on the next page). If you play Flight Control -- and those who do find it hard to put down -- you will absolutely love Harbor Master (iTunes link). The mechanism for control is the same: use your finger to draw a path to direct vehicles to their destination.

In this case you are controlling boats in a harbor. However, instead of merely docking them, you must juggle unloading their cargo (automated, but larger boats take longer) and sending them on their merry way. This pleasant twist on Flight Control's mechanics allows players of Harbor Master to steer clear of boredom.

Later levels add further twists, literally. One of the developers, Natalia, demonstrated a tiny hurricane, which will spin your boat around no matter what intended path you draw. Harbor Master also includes the requisite leaderboard, so if you like the high scores, you're covered (although you'll need to provide an email address and username).

The folks behind Harbor Master, Imangi Studios, have partnered with some other iPhone developers to provide some in-app promotion for each other in a service called App Treasures. Imagni also demoed another clever app, PhotoMarkr, at WWDC. It quickly and easily adds watermarks to photos on your iPhone. Check it out on the App Store here.

Update: fixed the Harbor Master link.

Have you seen anything like that already, where developers have said, well we thought about doing it this way, but we're going another way?

PR: Too early. The phones aren't even out yet, user experience hasn't occurred yet. I would say July, we'll get a lot of feedback once these games come out with push notifications. The other thing that's kind of interesting, by the way, is that OpenFeint is working on cross-compatibility, because if I have a 2.2 iPhone and you have a 3.0 iPhone, and you send me a social challenge, in my app on 2.2, it won't show up as a push notification, right, because I don't have the 3.0 iPhone. So we are support the concept of push notifications in the plumbing and infrastructure of OpenFeint, however on a 2.2 phone, whenever the user next opens the app, they would see a screen that is an OpenFeint screen that would have a notification saying "you've got to beat my score," as opposed to seeing it on the iPhone icon, as a number, like the Mail thing, where it says you have notes waiting for you.

So I think as a user experience, the jury's still out, because the platforms are just getting ready, right? So the key here is to say that we're going to make it trivial by continuing our tradition, which is no servers, very easy to integrate, and some big games will launch in July with push notifications and then we'll go from there.

I think, to a certain extent, the same thing will happen on the microtransactions side. It already has happened with Xbox Live -- I don't know if you remember the story of horse armor, where everyone says "how can you release a different graphic and ask us to pay for it?" Have you seen examples yet of how developers want to use microtransactions? Are they aware of that danger or are they fearful of that at all?

PR: So I think the obvious one, just because I have, as I said, investments in companies in the Facebook app space, the big reason for microtransactions is virtual goods. So any kind of virtual world, avatar apps, some of these Mafia iMob apps, you can assume that there will be virtual goods unlocking with microtransactions. That one I think will translate over fairly well, in fact Net is going next week to China, where he's a keynote speaker at Tencent's annual conference. Tencent is an Asian company which does a billion dollars in microtransactions, all of it virtual goods. So I think that microtransactions, as we see them on social networks today, will come pretty much that way onto the iPhone social network, or the iPhone gaming network.

NJ: I also think that it will actually lead to the pricing, might even drop dramatically, but those who are charging for applications are going to go free, because they're going to earn much more by making it free and leveraging microtransactions.

Yeah, if you're charging $4 for an app and can sell four levels for $1 each, that's the way to go.

NJ: The user starts playing, gets very engaged, and wants to get to the next level and make the purchase, and it's very difficult not to make the purchase if you're engaged and you want to continue the game.

PR: The thing that's a little trickier, I think, is when you have microtransactions that aren't directly virtual goods, because virtual goods don't fit the theme. But are like chapters, or just additional content in the game. Then, I think, the business model is a little trickier, because that's your content update strategy, and to some extent, the iPhone user is used to -- like, if you look at the success of Pocket God, it's a double edged sword. If you talk to the Pocket God guys, their game is one of the few games that stays in the top five constantly. It's just always in the top five. And they use OpenFeint, and they're going to use push notifications, but when we spoke to him about microtransactions, he said, I have to figure that out, because their commitment to their userbase is, every week you're going to get an update with more content. So given that he's already committed that on the current price point, how does he unlock more content with microtransactions? So he was the first to say I definitely want to do push notifications, but I have to think hard about how I could incorporate microtransactions into Pocket God. So I do think there's a little more complexity there, especially when it's not just direct virtual goods. But I think they'll crack it. I think some other people we're talking to are certainly thinking of Chapter 1, Chapter 2, Chapter 3, three microtransactions. And certainly the virtual goods guys are like no questions how they'll do it.

And there are definitely precedents for both, in terms of episodic gaming on other services. Jason maybe you can talk about this, too, as a developer -- I'm really interested in the balance between making sure that what you're selling people is worth it, or something that's not. If you're asking to pay a dollar for a gun that's just a re-skin, people won't go for that. What do you think of that?

JC: I think, as a game designer, what you have to really think about is the motivations for why people will want to purchase this content. Whether it's a re-skin or not is less important than what it will allow you to do in the game. And the reason why I think virtual goods have done so well on social networks is that social pressure is a huge motivator to getting people to do things, and if part of that social pressure results in you engaging and buying virtual content, people are much more likely to do it. I mean, if you just have another gun that allows you to increase your DPS by two points, that's not terribly interesting to anyone but the ultra hardcore gamer, and then they'll probably just be pissed off that they have to pay for it. So that's not really an appropriate way to go about it. As a traditional gamer, buying episodic content or buying level packs, or substantially new gameplay experience, fits with my head, and then virtual goods, I think, have to be motivated through social pressure.

And the last question I have is just about the future of OpenFeint. I have to give it you guys -- there were quite a few, and there still are, services poking around that want to do the kind of stuff that you're doing. And just in terms of size and influence right now, you're kind of the top of the heap. So what's next, are you planning to kind of sit on the heap and just keep things set, or are you still aiming to improve here?

PR: I think that definitely we will continue to innovate and add more services to the platform -- there's no question that it's a platform play, and that we will continue to add features and additional things. I would say two things: one is, we will publish games, always, on top of our own platform technology, that will really kind of push the borders of gameplay design around the OpenFeint platform, to sort of demostrate and lead the way. So in the last announcement, we did hint at a new game coming out this summer based around push notifications and microtransactions, where we want to lead the industry. Because we never think that by being in front today, that we will be always in front. So we want OpenFeint to be the premiere platform, we agree that today, we certainly feel like it's way up there, but we feel like you constantly have to build new product on top of your platform to really make a world class platform. Because otherwise you're just sort of opining and thinking oh, this is good stuff. So we always want to test our own platform, and expect a title this summer based on OS 3.0 and OpenFeint features.

The second thing, which is, I think we're really doing something different around the business model. Ngmoco announced their Plus+ platform this week, and it's really a publishing tool rather than an open platform, and we're pretty proud of the fact that we're sort of the biggest player who is really able to provide an open platform where a developer does not have to make a publishing deal with us in order to get access to the platform. Ngmoco's platform is hey, we have this platform, it's part of our publishing network, and if you want to publish games with us, that's how you get the platform, and obviously you know the economics of the publishing business in the game industry, right? There's revenue that has to be sacrificed there. So I think as a guiding strategy, we will never make our platform related to anything with our publishing because it's our belief that this OpenFeint thing does two things that we will always have to provide for publishers: no servers, because 90% of developers have no experience building servers, they build great console games, client side stuff, C, C++ programming, all this stuff, but they really don't have any backend experience. And two, we're not going to take rev share, in terms of publishing deals. And those two things, I think, are sort of our long-term guides. The third thing is to build our own games constantly, so we can use Danielle and Jason's game design and knowledge to say here's the kind of games we can do. So if we can do that and execute, I think, with some fingers crossed, with some luck, we'll emerge as the de facto standard, which is our goal.

I had talked to Danielle a little about pricing already, but I wanted to ask about microtransactions as well -- when you do that stuff, are you not skimming off revenue as it comes through, or what is the pricing scheme there?

PR: Well even today, we have cross promotion inside OpenFeint 2, even before microtransactions, where if two players meet in a lobby, and they're from different games, then one player clicks on the other player's game, and you go to the App Store and you buy that other player's game? That's what you call our one-touch iPromote product inside of OpenFeint, it's a big draw for a lot of developers, because our community is now three million and growing -- we call it our social bazaar, because the App Store is so cluttered now that it's hard to differentiate. So you use OpenFeint and get your game in front of three million people in these lobbies. That revenue, when someone buys a game using OpenFeint's cross promotion feature, doesn't come from the developer, it comes from Apple. Because we are an Apple affiliate, through BigShare. So we take the user into a webview, which is our own catalog, where you can buy games off the App Store, and then Apple actually pays us. So that's hopefully -- this is the same thing, the whole idea is to get Apple to pay us every time there's a purchase in the App Store, including in-app purchases, as opposed to the outside.

Great. That's pretty much everything I had to ask, was there anything else you wanted to share? I guess we'll keep an eye on the game coming out this summer.

JC: Yeah, I guess the only other thing worth mentioning is that OpenFeint is available now -- it can be downloaded by anyone from our website. It's real.

Cool. Thanks very much.

Danielle Cassley and Jason Citron are the folks with their names on Aurora Feint, but as Danielle told us in an interview a while ago, Peter Relan is the real mastermind behind the growing Feint empire. Not only did he put the two together in an idea lab, but he's one of the driving forces behind the OpenFeint enterprise. Under his oversight, the Feint folks have swelled to become one of the major forces behind iPhone gaming (and thus, behind the iPhone's app ecosystem itself).

Netanel "Net" Jacobsson is a newer addition -- he's previously worked with Sony Ericsson on their mobile devices and Facebook on their own growing app empire, and now he's arrived at OpenFeint to help them use the lessons he's learned at the biggest online social networks around on their social software. Get the sense of how big this is yet? Relan, Jacobsen, and Citron all have pretty big ideas about where iPhone gaming is going, and as 3.0 comes down the pike and introduces a whole set of new features from Apple, they're in the best seat they can be in to do exactly what they want to do.

TUAW sat down with the three last week, and chatted about iPhone 3.0 and why it's such a big deal for developers, how they're going to approach microtransactions (carefully), and what's coming next for OpenFeint now that they've rounded up a whole stable full of developers implementing their backbone. Click "read more" to continue.

Feeling nostalgic? Applemctom has posted a great video detailing the evolution of Mac gaming from Dark Tower, released in 1986, right up to the resurgence and explosion of gaming on the iPhone.

Take a look and see if your favorites are covered. My vote for inclusion in the sequel is Wolfenstein 3D.

See, now this is the kind of game I want from my iPhone -- the accelerometer isn't just a gimmick thrown in with the gameplay, it's the actual premise of the game. Diorama is a weird little Marble Madness-style maze game, but the catch here is that instead of just tilting the accelerometer to move the ball (which you do), the level of the game actually moves with you, so that you get a stereoscopic kind of effect, as if the stage is real inside your iPhone's screen. Tough to explain, but as soon as you see it above, you'll know what it's like. We've seen this kind of effect before in apps like MotionX's Dice roller, but in this case, it's actually part of the game -- you can only find the paths to take around the stages by actually tilting the device. And for extra 3D viewing, there's an actual 3D mode, so if you happen to have red and cyan glasses around, you can switch on the mode for anaglyphic 3D.

The app is the first iPhone release from a company called Drömsynt, and though the initial reports on iTunes say the game is pretty tough (it is a pain navigating the quickly-moving ball around those pathways), for just 99 cents, it's definitely worth downloading, if only to see how it works. So many apps just throw in a few iPhone-specific features as afterthoughts, but it's refreshing to see a game like this (or like Zen Bound, which really depends on the multitouch screen) rely on the originality of the hardware itself.

With iPhone OS 3.0 only having been released yesterday, two big companies are already angling to be developers' go-to for setting up push notifications and other online services for the new apps. OpenFeint was the first service we've heard about -- they have been offering social networking connections to developers for a while, but with the new firmware release, they tell us that they're also hosting options for both push notifications and microtransactions to their stable of app developers.

That stable includes apps like Pocket God and Aurora Feint (Danielle Cassley of both Aurora Feint and OpenFeint told us a while back that she was very excited at the prospect of microtransactions with 3.0), and both of those games, as well as others on the service, are planning to include push notifications with "social challenges" -- you'll challenge a friend to complete a certain goal in game, and then get notified when they meet that goal. Look for those new features in an OpenFeint app near you.

And OpenFeint isn't the only service jockeying for developers' attention -- Urban Airship is also making a bid to host push notifications for iPhone game developers. They've landed one of the first push-enabled games, Tap Tap Revenge, and are looking to offer push to more devs, along with in-app purchase support as well. They don't quite have the library together that OpenFeint already does, but their service integrates, they say, in just a matter of hours, and their aim is to make it "brain dead easy" for developers.

The floodgates are open, and we're sure to see more and more companies jump in on hosting plans like this in the future. Prepare to be pushed.