Since the arrival of the Push Notifications feature in iPhone OS 3.0, all manner of apps have added support for it. Games, task management applications, you name it -- they're all more than happy to make your phone beep at you in the middle of the night and prompt your spouse to kindly insist that you silence that infernal device. Or so I've heard.

It seems like a no-brainer to me that this type of functionality would exist among the throngs of social networking applications. If the game where you flick the thing while the music is playing can tell me when I've got a new challenger from the Far East, why can't my favorite Twitter client let me know when I've got a new direct message? Sadly, most of the apps in the store (as far as I know) haven't implemented this functionality yet. I realize that it has some sporadic adoption, but certainly not the universal support that I personally expected.

Enter Boxcar [iTunes Link]. This little free app has existed in the store for months now and has received some very nice reviews, and for good reason. I've been a faithful user of this app for many moons and I find it pretty indispensable. Here's how it works:

When you install the app (which is free at the time of this writing), you can choose to enable a single service for notification -- Twitter, Facebook or an email account. It will poll the selected service at a short interval and send you a standard push notification message if there are any updates. In the case of Twitter, you can configure it to open one of several supported Twitter client apps. If you want to enable additional services, you can do so through the in-app purchase mechanism, and most options cost $.99US.

I'm a big fan of Boxcar and use it for Twitter and Facebook. It's one of those free applications that's actually worth more than what you're paying for it -- a quality that's becoming increasingly rare among free iPhone apps these days! Version 2.1 was just released a few days ago and includes several new features like support for Facebook Mail and better accessibility.

Pick up Boxcar now for free from the App Store.

Just like the Facebook pages that Apple has set up for iTunes and the iTunes Trailers Twitter account, Apple has just set up several Twitter accounts for iTunes, which cover Music, Podcasts, Movies and TV Shows.

First, the Music account, twitter.com/iTunesMusic , will provide information on "new releases, pre-orders, iTunes LP, exclusive offers and more."

Second, the Podcasting account, twitter.com/iTunesPodcasts , will provide a "Podcast Episode of the Day, from iTunes Podcasting."

Next, the iTunes Movies account, twitter.com/iTunesMovies , doesn't contain a description, but does contain one tweet so far, and it looks like it will be used for Movies on the iTunes Store.

Finally, the iTunes TV account, twitter.com/iTunesTV , which contains no tweets yet, will provide "Official TV updates from the U.S. iTunes Store on Twitter."

Will these accounts make a impact on what you discover in the iTunes Store? Let us know in the comments below!

If you were Jack Dorsey, one of the co-founders and current chairman of Twitter, you'd want to think about something else big to follow up on your huge success.

While it doesn't sound like anything groundbreaking, Dorsey's new company Square is developing a tiny white cube (see photo above) that plugs into the headphone jack on either an iPhone or iPod touch. The cube is a credit card reader, something missing from all of those credit card apps currently in the iTunes App Store.

The Square iPhone Payment System consists of the reader and an app. After a card swipe, the customer uses a finger to sign the iPod touch or iPhone, one of the participants in the transaction enters the customer's email address, and a receipt with the location of the transaction, the signature, and other standard information is emailed to the customer.

While most online journalists are anticipating that this device and software are going to be used in retail (can you say Apple Store?), I think Dorsey has bigger ideas - let's face it, the guy doesn't think small. So why not make it possible for anyone with an iPhone or iPod touch to be able to accept credit cards for payments? Word has it that the card reader's manufacturing price will be as low as US$0.40, which means that Square could give away the readers and still make money on the transaction fees.

[via Engadget]

Zensify announced its latest app, ZenNews [iTunes link], this morning. It's basically an intelligent news aggregator, using algorithms to find "what's hot" from a variety of sources including the New York Times, the Washington Post, Al Jazeera, the Guardian and more. It parses Twitter and other social mediums to figure out who's talking about what, and then creates a tag cloud of hot topics. There's an aggregated view combining all sources, or you can view a tag cloud for each source. You can toggle sources and/or categories on and off in the preferences.

If a keyword in the tag cloud reveals more than 5 articles, tapping it will drill down into another tag cloud, repeated until the keyword returns a list of 5 or fewer articles. View articles within ZenNews using the built-in webkit browser, or open them in Safari. You can always switch from the tag cloud to a list view for any page, and there's a default view titled "All News" which lists all the aggregated news (in list format) at once. You can drill down to specific topics in the Categories view, and see what's new/hot from all enabled sources for a single category. As you read, you can mark any article as a favorite, and view a list of your marked articles in the Favorites view. You can quickly share articles via Twitter or email, as well.

It's all quite slick, and pretty solid for a first release. I did run into a bug which would bring up blank tag cloud pages if a specific combination of being on a certain view and losing a network connection at the right time occurred. I spoke with the developers yesterday, and I'm confident they'll smooth out any wrinkles quickly.

Zensify is offering ZenNews for free. Their plan is to demonstrate the buzz-detecting algorithms, and then offer white-label versions -- using a subscription model -- to companies with a need for up-to-the-minute buzz tracking. For the rest of us, this is a good-looking and, as far as I've been able to tell, accurate way to see what's happening in the world at any given moment. Check out the gallery below for a preview, and grab a copy on the App Store.

Ever since I first saw heads-up-displays in science fiction movies like The Terminator, I knew that I had to get my hands on one. How neat it would be to get instant information on anything about anything in my field of vision?

Well, just as the iTablet won't be the Knowledge Navigator, the new buzz-phrase of the year, augmented reality, won't give me Terminator eyes. Such is life.

I tested out a pretty decent augmented reality app called Robotvision [iTunes Link], and for US $0.99 what you get, if you have an iPhone 3GS running OS 3.1 or better, is quite cool. Will it solve your problems, cure the common cold, or tell you anything that more established apps won't? Not really. But tossing a buck on a neat novelty is not unheard of in the iPhone 3GS world.

This one does more than most. First you tell it how widely to search and then, if you're in a highly populated area, you can set up a category ranging from ATMs to Travel Destinations. For the most part, I didn't fool with this since being in the suburbs, I can't be too picky.

Run it and the camera shutter opens. Moving the iPhone around, I found Cousin's Pizza, only 8432.1 miles away. Hmmm. The setting was for 5 miles. Wait, I guess it needed to be calibrated by doing the calibration figure eight wave of the phone. It seems that a lot of GPS apps require this.

OK, much better. It found a bunch of places but they were all stacked on top of one another. No big deal, since when you touch one, you get a screen like the one in the picture. The closest place is displayed first and the right and left arrows take you back and forth through the stack. While an item is in the front pane, you can call them, see them on a map (by cleverly pointing the iPhone to the floor, which invokes Google Maps, but all the stick pins aren't really any clearer than the AR view... maybe less so). You can also hit the Bing button where there might be a review or more information.

The problem is that the direction it puts you in is not quite accurate. It might get you to a nearby corner, but not to the butcher shop itself. I don't think we can slight Robotvision on this, since the not quite pin-point accuracy of the iPhone 3GS GPS has already been talked to death.

What else can this bad-boy do? You can see who is sending tweets in the area you specified, read the tweets and see how far the tweeter is from you. Not enough? Wait, there's more. You can find people in your area who use Flickr, and view their gallery. This doesn't work too well. I set the default for 50 miles and found no one. Then I set it for 25 miles and found one person with a gallery of 10 pictures. I live 30 miles from NYC, so I can't blame it on the boonies. You still want Ginsu knives? Okay, hit the Wikipedia button and see if anything in your range is listed. If so you'll get a bit of text and the option to go to Wikipedia to read more.

I don't know if AR will change the world, or be as successful as either New Coke or the iPod. But I'd suggest tossing a buck at this one. You are guaranteed 20 minutes of awe and then maybe some time to reflect on what you have, once the novelty wears off.

Check out this video for a tour and let us know what you think about this or the idea of augmented reality in general.

Users of Tweetie, the popular Twitter client for both Mac and iPhone, have reason to be excited: a new version of the iPhone app, Tweetie 2 (aptly codenamed "Bigbird"), is confirmed to be on the way.

In a preview of the new version, Scott Kleinberg of ChicagoNow detailed his experiences with beta builds of the upcoming release. From the screenshots provided, it's clear that several interface improvements have been made, including a quick menu that provides easy access to several new features while posting a tweet. Other improvements include the ability to send video tweets, persistent session handling that restores the app to its previous state, conversation threading, draft management, and geotagging.

While Scott's review suggests that the changes and improvements make Tweetie 2 feel like a whole new app, Tweetie developer Loren Brichter indicates that it really is -- it's a complete rewrite from the original app. In addition to the major features, the new version also boasts integration with several 3rd party services, and a host of configuration options, from new gesture options to custom Twitter API settings.

Of course, not everyone will be happy with the update. There is already a stir among beta testers over the app's use of pinstripe backgrounds on the profile and single tweet views. Also, there is the issue of cost: Tweetie 2 will set you back $2.99, as it is being offered as a new app instead of a free upgrade to existing users. When it comes to upgrades, most desktop applications follow a pattern where minor updates (such as upgrading from version 1.0 to 1.1 or 1.1.2 -- often refered to as "point releases") are provided free of charge, and major updates (from version 1.0 to 2.0) usually require the user to purchase the new version of the software.

With iPhone apps, however, Apple does not provide a system to allow developers to do this. Developers can release upgrades and bug fixes as free updates to their applications, but if they invest a lot of time into a major update to their app, they have to submit it as a new, different version of the application rather than an upgrade to the old version, and there is no option to allow users who have perviously purchased the original app to receive a discount on the new version. So users are faced with having to pay full price for the upgrade, which in this case, is another $2.99.

In my opinion, this is not an unreasonable amount to pay for a major upgrade to an already great application, but there are users who feel they shouldn't have to pay for the upgrade. My advice to them? If you can't spare $3 for the amount of time and effort that was put into making a decent, feature-rich upgrade, don't bother using it. Stick with the original Tweetie or find another app that you're willing to pay for.

So, controversy aside, Tweetie 2 looks very promising. The latest beta build that was provided to developers is expected to be the final build, and if things go well, we should see it hit the App Store in the coming weeks. An update to the desktop version of Tweetie is also in the works, and will probably surface after the iPhone app is released.

Update: TUAW reader Ahmed drew our attention to this tweet, indicating that Tweetie 2 has been submitted to Apple! Assuming there are no hold-ups, we can probably expect to see it hit the App Store in a few weeks.

What do you think of the new version? Will you be upgrading when it's released? Let us know in the comments!

CNN chatted with our good friends at DLS about the news network's iPhone app (scheduled to hit an App Store near you very soon), and it actually sounds pretty premium: in-app video, breaking news live video streaming, a Coverflow-style way to browse news information, the ability to store news to read later, and social sharing through Facebook, Twitter, and the usual suspects. CNN even says they want to add more to the app in the future, including some iReport-style news delivery functions, so people with iPhones out in the world can send news in as quickly as possible.

Ok, CNN, we get it -- you care about this one. It does sound like they're making a major push in terms of making their content interactive on the iPhone, but on the other hand, maybe they're just trying to sell you on the "premium" price: $1.99, with (we're told) non-intrusive advertising included. Obviously, $2 is cheap, but on the other hand, especially with advertising both from the network itself and outside clients, the crankiest of App Store browsers will probably flinch at it a little bit. If you are interested, however, CNN would love to take your money: their app should be available in the App Store as soon as Apple lets it through.

We're always trying new things around here, from apps to web services to hardware and all kinds of novel ways to do what we do. We also appreciate the fact that many of you read us via RSS or even the iPhone. To that end, here's a list of the many ways to enjoy TUAW in all its myriad forms. If you think we're missing something spectacular, let us know in the comments.

Heeeere's TUAW, in reverse order of no particular importance:

Important safety tip: Please read the instructions for TweetMyMac carefully, especially the part about creating a separate Twitter account for your Mac -- do not use your regular Twitter account, or anyone you follow will be able to control your machine.

We have previously covered some of the ways in which it is possible to remotely control a Mac at home or in the office. Most of our suggestions have required the use of Mail in order to process some rule and kick off a script or Automator action.

Alex P over at TheMacBox aims to change all of that. Enter TweetMyMac, the little program that lets you get screenshots, iSight snapshots, or launch a program through the use of Twitter. While the list of commands available is not currently as comprehensive as what your imagination can create with a little AppleScript or Automator whizzbangery, it is a good list and growing as well.

An obvious benefit of this approach is the ease of getting everything set up. In the past it took an AppleScript to call another Automator action or some other kludgey-at-best method to get things working. With TweetMyMac there is very little effort required for setup.

Another neat feature is that TweetMyMac will run a shell command. With a little scripting you can create your own custom commands. And using the previously-covered technique of sending tweets via the command line you can have your custom commands send information back to you as well.

There's no shortage of Twitter apps in the App Store. Even more surprising is the number of GOOD apps that connect to the popular microblogging platform. I like each for a different reason: Tweetie has a clean user interface, TweetDeck offers multiple columns that sync with its desktop counterpart, and TwitterFon has ReadItLater integration. There are countless others that have unique features, and many of us end up with at least a couple on our iDevices.

But I have a new favorite, qTweeter, developed by the folks at Efiko Software. You won't find it in the App Store, though, because this app requires a jailbroken device. Multitasking isn't officially allowed (yet?) on the iPhone OS, yet qTweeter relies on this capability to perform its best trick.

Say you're checking the weather and want to tell everyone of the approaching hurricane. Normally, you would close your weather application, swipe through pages of apps, tap on and wait for your favorite Twitter client to open and load all of the tweets that you really don't care about right now, and finally type your warning to get the heck out of town. By the time you do all of that, the highway is going to be grid-locked with fleeing residents and you'll be stuck boarding up windows and sweeping up the debris!

Instead, you could have just "pulled" qTweeter down from the status bar, typed your tweet, and went back to the app still running in the background.

In fact, per the recent trend, you could have also posted that same message to your Facebook status with just a tap of a checkbox. It's a much quicker way to get your message out of your head and onto the Net, a fact that you'll appreciate as you get older and those thoughts become more fleeting.

The Iconfactory's Twitter for iPhone client app, Twitterrific [iTunes link] , has been updated to 2.1. The new version has added several new features that make it far more useful than before. A few highlights:

• New "Load More..." button at the bottom of the timeline to retrieve older tweets
• New "Following" and "Followers" lists in author view
• Support for recording, posting, and viewing videos (recording and posting require iPhone 3GS)
• Built-in browser now supports landscape orientation
• Image links are now displayed in a photo viewer
• Long uploads now show a percentage completed
• Added in-app email support

The update comes with bug fixes as well, including improved typing speed, plugged memory leaks, and many more.

Twitterrific is the only Twitter client app I've used for my iPhone so far. The free version may be ad-supported, but even before this update its smooth interface and impressive functionality were enough for Twitterrific to make it to my iPhone's first page of apps. So far the update seems to run far smoother, and the added features, particularly "Load More..." and the Following/Followers lists, ensure that this will most likely remain my Twitter app of choice.

I don't have a 3GS, so I wasn't able to test the video upload feature in Twitterrific 2.1. Our own Dave Caolo used it on his 3GS to upload a ten-second film, and he said it took less than thirty seconds to upload it over 3G.

Oddly enough, even though the app has a built-in internet browser, it's still only rated 4+. Other apps have run into approval hurdles from Apple's app store requiring them to be rated 17+ because the built-in browser "could be used to link to objectionable content." Perhaps we're seeing the end of this practice?

What's better than pictures of Mac OS X 10.6 Snow Leopard in the wild? How about a snapshot of Snow Leopard running on a hackint0sh? While this could be a doctored photo, it does show a Eee PC 901 netbook with several windows open on the screen. In the About This Mac window are the magic characters "Build 10A432", which all good TUAW readers should recognize as the build number for the Golden Master of Snow Leopard. Click the Read More link to see the picture.

Like many Mac users, we at TUAW are big Twitter fans (and also fans of some of the great iPhone and Mac clients for the service). Early this Thursday morning, Twitter became unavailable due to a denial of service attack, according to Biz Stone, Twitter's co-founder. Such attacks are deliberate attempts to disrupt service for malicious purposes.

Twitter came sporadically back online at around 9:15am EST after being down for roughly two and a half hours. As of 9:46 EST Twitter reported that they were working on restoring full service and that the system may be slow to respond to some users.

In my case, at around 1:45p EST, it took three or four minutes for Twitter to be accessible. The company's status blog says they are still working on addressing the issue.

[via InformationWeek]

Here are two different insights from Pocket Gamer about how developers can grow the profile of their iPhone apps. The first comes to us from the wisdom of Peggle, that game that I just can't stop playing. Apparently, they've coined the term "Peggling," which means lowering the price of your app, and seeing a huge benefit from it. Whenever a game drops its price down to 99 cents, much as Peggle did soon after release, it sees a significant bump in the charts. I'm sure there are many other factors at play here -- Peggle was a great game, so you can't sell more of a crappy game just by selling it for cheaper, and I saw a lot of Twitter and blog attention when the price dropped, so it pays to have people watching the price in the first place. But under the right circumstances, dropping the price can do a lot for a game that's already selling pretty well.

But an update, apparently, won't. That's what the makers of Zen Bound told Pocket Gamer -- they say that when they released an update with new levels and new features, it didn't make a difference in their sale numbers at all. Games like Pocket God have made a reputation for themselves by providing regular and solid updates, and certainly it seems like those updates have at least spurred sales, if not made them blow up, but the Zen Bound guys say that singular updates on major products probably won't kick sales into gear.

Interesting. We're at least a few generations into App Store sales at this point, and we're started to see trends and consumer behavior in better relief; developers are getting better and better ideas every day about how to price and service their apps and customers.

It's an increasingly crowded category on the App Store: Social Networking. Like several other apps in this category, Zensify (iTunes link) doesn't just tap into one social networking service. The app is an aggregator, taking multiple sites and rolling them up into one app that will, in theory, make your social networking somehow easier. That's the promise of all these aggregator apps. So how does Zensify do?

First, Zensify supports Twitter, Facebook, Flickr, Digg, Delicious, YouTube, 12seconds and Photobucket. Unfortunately, I had only moderate success with signing in to some of these. Flickr takes you to the requisite Flickr-based verification pages, but after going through the process I received a warning dialog that an error had occurred, with only OK as my option to continue -- right before the app froze up completely. Then I tried Digg, but there was only a username field, not a password field. I was able to get Delicious to work, and YouTube (after quitting the app, as there was a bug preventing me from typing in the text area). I didn't try Photobucket or 12seconds, as I'm not big on those.

I should note that I wound up deleting Zensify, then re-installing it, and something interesting happened -- once I had re-logged into Facebook Connect, my previous logins "stuck." I only needed to type in my username on digg and it said everything was logged in. That was a pretty neat trick, and a re-install appears to take care of some of the initial bugs. I'm assured by the folks at Zensify that several other bugs are being crushed for the next release.

While Zensify is pretty in parts, there are functionality issues. These are because, in an effort to do everything, the app winds up a confusing mess at times. Many apps suffer from this, especially social networking apps. Keep reading for my full review.