With only two more days to go until the launch of the iPhone 3G S, we have been getting a lot of questions from readers about things like cases, new features, and of course, upgrading from another iPhone.

Can I use my 3G case with the 3G S?

Yes! While there are a few manufacturers that are now advertising cases for the 3G S, there are no physical differences from the 3G. So any existing cases or accessories you may have should work with the 3G S just fine.

Well then, what exactly is different about the 3G S?

Although the physical appearance didn't change, there are a few significant changes to the hardware in the 3G S. Most notably, the CPU, video chipset, and memory have all been upgraded, as well as the addition of a digital compass, faster 3G radio, and improved camera lens. There are also some software enhancements to allow voice control, video editing, and more.

Can't I just install 3.0 and get the same features?

Not quite. Installing the 3.0 update will get you several of the new features, such as copy and paste, voice notes, MMS, and tethering (if your carrier supports it, anyways), but some of the features will only be available on the 3G S. Things like voice control, video editing and sharing, compass navigation and accessibility improvements take advantage of the new hardware found in the 3G S to provide a better user experience, so Apple doesn't offer those features to users of older iPhones.

Can I upgrade from my iPhone or iPhone 3G?

Yes! From the hardware side of things, upgrading is as easy as plugging in your new iPhone to iTunes, then selecting that you want to restore your backup to the new phone. Alternatively, you can set it up as a new phone, and just sync the apps, music and other items that you want without restoring the full backup.

From the cell phone carrier side of things, upgrading is a bit more complicated, depending on when you purchased your phone, and the terms of your individual contract. Luckily, some providers are offering special terms to encourage customers to upgrade.

Where can I find out more about the iPhone 3G S?

If you're starving for details, our friends over at Engadget have a full review of the new iPhone, including an unboxing gallery and sample videos. If you're looking for a side-by-side comparison to the 3G, Walt Mossberg chimes in with his take on the All Things DIgital blog. And, as always, you can check out our iPhone 3G S articles here on TUAW.

I ended up going with an iSkin Revo for my iPhone as a thin little protective case, but now that I've seen some of these crazy cases, I'm reconsidering just a little bit. Who wouldn't want to encase your iPhone in what appears to be bacon, or try out the tactile iPhone case above (which transmits button presses to a customized home screen -- not something I'd want to use all the time, but it is wild and it has a purpose).

That Dexter case is cool too, though there are probably plenty of promotional cases out there. It's almost too bad -- when I picked up my plain black case, I was thinking a lot more about function than appearance. There's all kinds of cool things out there to put your iPhone in.

[via Urlesque]

Thinking green? Voltaic Systems' Generator laptop bag (US$499) might be just the thing to buy for Earth Day on April 22nd.
I had a chance to road test one of these incredibly cool bags for a month and was very impressed. What makes it so special? Well, it could be the big photovoltaic panel on one side of the Generator that provides 15 watts of power to feed your electronic devices. Voltaic points out that the Generator is the "first solar bag powerful enough to recharge a laptop." That panel charges an internal 58Wh Lithium Ion battery pack that can run most laptops.

The solar panel isn't the only thing that's green about this bag. The materials that make up the majority of the bag are made from recycled PET soda bottles. In fact, the shell, webbing, mesh and lining of the case are made of 100% recycled materials.

As promised, we're launching a new series called Road Tested where we try out various products for a month or more, see how they hold up to extended "real world" use, and report back our findings. To kick things off we're looking at the EcoRunner from Marware [thanks to our friends at Dr. Bott for the review unit].

The EcoRunner is a "green" product in that the primary material is not neoprene, but "a revolutionary environmentally friendly material." I'm not sure what that is, but I can say I like it better than neoprene -- it feels just as soft, but the cells are smaller and thus the material is more supple. The EcoRunner can be worn on the wrist or arm (using an extender strap, included) and is designed for the 4th-gen iPod nano. There's the requisite vinyl window for controlling playback and viewing the screen, plus the case can be used with the Nike+ Sport kit attached (there's a strap to keep everything in).

Does it work? Well, there's one caveat to our test: we used a 1st-gen nano, the white model that was infamous for being easily scratched. It's increasingly tough to find cases for this model, but we found the EcoRunner is stretchy enough to accommodate the slightly thicker model. The side effect of this, possibly due to thickness or the more squarish design: the vinyl window busted (see gallery), leaving the unit exposed and capable of falling out. Call it a "stress test." It's definitely a design challenge to secure the vinyl in a way that won't get too stressed, especially in cases where everything else is so stretchy.

The softness of the case can't be understated. It is really smooth and lightweight and stretchy. I'm partial to wrist straps, because I tend to skip around my playlists depending on my workout. If you find yourself monkeying with your nano during a workout, this is a terrific wrist strap. The extension strap to use it on your arm adds virtually no weight, and holds up well, but bulging biceps might strain that window. The Velcro used is very high quality, but the stitching on the end can sometimes be a little tricky to thread through the grommet -- so I recommend not removing it entirely. Just pull it off your wrist. One upside is that you can charge the nano in the case, so the entire unit becomes home to your nano. If you only use your nano for working out, you'll never have to remove it from the case.

After a month (OK, nearly 2 months) of solid use -- we're talking about near-daily use on the treadmill and at the gym -- the EcoRunner holds up well. As I said, using a 1st-gen nano isn't recommended by us or the manufacturer, so I don't know if the thinner nanos would bust the window after prolonged use. Other than that, there's very little visible wear-and-tear, and I'd recommend this especially if you a) prefer your nano on your wrist, and b) need a case that'll hold the Nike+ Sport kit. Your choices are pretty limited when it comes to both of those criteria, but the EcoRunner is a good bet either way. If you've had experience with this particular model, let us know in the comments.

UPDATE: Great questions in the comments! As far as sweat retention, since my wrist doesn't sweat too much, I'd have to say no problems there. You might have an issue with a very sweaty bicep, but I feel the material's tighter cells (as opposed the larger, more open cells found in neoprene) would guard pretty well against this. There's no signs of staining, either.

The extender strap adds a little over 6 inches to the overall strap length. Total that's 11.5 inches (see added gallery image). My puny biceps fit fine, but if you have some massive guns then yeah, you might have a problem.

There's a new rumor floating around which claims that the case of an upcoming 16GB 3G iPhone has been photographed. The shot, now posted at iPhone Observer with similar images at MacRumors, depicts a matte black iPhone with the model number "A1303." It's also been suggested that the case in question is metallic, not plastic like on current 3G models.

In the end, what do we have here? A photo of 1/3 of a single side of an iPhone (why not post the whole photo?), a unique model number (I'm pretty sure my 5-year-old could come up with one of those) and the word of a rumor-crazy Mac community.

Is this the case of a future iPhone? Could be. But we're not betting the farm on it.

[Via MacDailyNews]

We've written about some elaborate hardware and accessories, like the golden iPod and the gilded MacBook Air case. While this is less extravagant, it isn't your average laptop case either.

The truly beautiful and aptly-named Wooden Laptop Case is lined with leather and features a magnetic enclosure. There's a model for both the 15" MacBook and MacBook Pro. We haven't seen one in person, but it definitely looks beautiful in the publicity photos.

No pricing or shipping information is shared. Instead, you're asked to contact the designer for that information. And just like seeing "Market Price" on a restaurant menu, we know what that means. It ain't cheap.

If you grab one of these beauties, please let us know.

[Via Macworld]

Plenty of folks are probably getting iPhone gift cards this season, and for anyone who wants to make their iPhone the hit of the party (later, once you've actually purchased and activated the thing) here's a lineup for you: some speakers (which fit just about every iPod ever made plus the iPhone), a stylus to keep grubby fingers of your precious, and a case.

I tested the JBL speakers and the stylus. The JBL speakers provide an astonishing amount of sound in such a small package. We turned it up as far as felt safe, and the kids had their fingers in their ears. Plus, at either loud or soft volume the audio was always very clear, not muddled with bass or too tinny on the high end (this was from the iPhone with no EQ).

The Pogo stylus does what it says: provides a poking stick for the iPhone's surface that works. It's a stick, and it pokes -- that's about as good a recommendation as you'll get from a stylus. The thing was just a short piece of aluminum too, so there's no heft at all. If you're used to a Mont Blanc in your hand you may be disappointed, I guess.

Thanks to Dr. Bott for the JBL On Stage 200iD Speakers, iSkin Revo2 iPhone 3G case (in red and black) and a Pogo iPhone stylus.

• Open to legal residents of the 50 United States, the District of Columbia and Canada (excluding Quebec) who are 18 and older.
• To enter leave a comment telling us what music you would play on some really loud speakers.
• The comment must be left before December 31, 11:59PM Eastern Time.
• You may enter only once.
• One winner will be selected in a random drawing.
• Prize: JBL On Stage 200iD Speakers ($149.95), iSkin Revo2 iPhone 3G case ($39.99), Pogo iPhone stylus ($19.95)
• Click Here for complete Official Rules.

Budgets are tight, we get that. So this holiday season, if all you could afford for yourself or a loved one was a 3rd-gen nano, we've got a trio of cases for you: one for running, one for general protection and one with little built-in speakers, for sing-alongs.

Again, courtesy Dr. Bott: ifrogz Audiowrapz ($24.99), Griffin Streamline ($20.99), ifrogz Treadz ($14.95)

• Open to legal residents of the 50 United States, the District of Columbia and Canada (excluding Quebec) who are 18 and older.
• To enter leave a comment telling us what your favorite color is, if you have one.
• The comment must be left before December 31, 11:59PM Eastern Time.
• You may enter only once.
• One winner will be selected in a random drawing.
• Prize: ifrogz Audiowrapz ($24.99), Griffin Streamline ($20.99), ifrogz Treadz ($14.95)
• Click Here for complete Official Rules.

For the next 5 days we're giving away a bunch of stuff from our friends at Dr. Bott. Check back each day for a new chance to win a bundle of goodies, each with a theme.

Today the theme is "the active iPodder," or all those folks you see running with their iPods strapped to their arms. So we're including the Marware Sportsuit for a long-distance runner (holds up to 160 GB of music) and an EcoRunner 4th-gen nano strap for shorter distances. Plus, you'll want to hear your music while you drive around (perhaps to wherever you're going to run), so we're throwing a Griffin iTrip Auto SE in the mix.

I have tried the latest versions of these iTrip devices, and I have to say they are much better than previous models. Provided you have a clear channel, the signal is strong enough to provide a decent FM sound. My wife, a conisseur of nano wrist straps, was duly impressed with the EcoRunner -- it fits on your arm as well and is supposed to be more green by not using neoprene as the primary material. We didn't give it a long test, as giving away sweaty merchandise isn't cool, but our 1st-gen nano fit (thanks to the way the sleeve is made), which was cool.

Win a Marware 4th-gen nano wrist/arm strap, a Griffin iTrip, a Marware Sportsuit Convertible for iPod classic (80 and 160 GB versions) and the very last of our now old-skool TUAW t-shirt (only available in small). To enter, just tell us whether you are a runner, a cyclist or none of the above.

• Open to legal residents of the 50 United States, the District of Columbia and Canada (excluding Quebec) who are 18 and older.
• To enter leave a comment telling us whether you are a runner, a cyclist or none of the above.
  
• The comment must be left before December 31, 11:59PM Eastern Time.
• You may enter only once.
• One winner will be selected in a random drawing.
• Prize: TUAW t-shirt ($5), Marware Sportsuit Convertible for iPod classic ($34.99), Griffin iTrip Auto ($69.99), Marware Eco Runner ($34.99)
  
• Click Here for complete Official Rules.

Rumors of a smaller "iPhone nano" have been flying around the blogosphere since mid-summer. Earlier this month, a TUAW post detailed how a Chinese manufacturer was allegedly starting production of a case for a diminutive iPhone.

Now a source that has accurately leaked information about the iPhone 3G and 4G iPod nano has jumped into the fray. XSKN began selling iPhone 3G cases in mid-May of 2008, almost 2 months prior to the release of the 3G. In early September, XSKN was showing off new 4th Generation iPod nano cases.

The XSKN site is currently showing a heading for the iPhone nano (see screenshot at right), although there are no actual cases displayed. Given the track record of this manufacturer for inadvertently or deliberately spilling the beans, this might be pointing towards an announcement of the iPhone nano during the Philnote at Macworld Expo 2009.

Since TUAW readers are the smartest and best-looking Apple fans on the planet, I thought I'd ask your opinion on whether or not the iPhone nano is going to become reality soon. Take our iPhone nano poll and give us your thoughts on the mini-me of the iPhone world.

Update: Sharp-eyed reader William went to http://www.iphonenano.com, and lo and behold the URL resolves to the Apple iPhone web page!

[via MacRumours]

We get a small number of physical products to review around here, and the streets are thick with iPhone cases of every variety -- but Element Case stood out. These aren't generic leather or plastic cases, they are somewhat beefier plastic cases available with metal, carbon or wood accents and sporting magnetic "flip" lids. The added surface area makes it a little easier to play games, especially if you're getting cramps playing Fieldrunner all day. At the end of this review we've got a special-edition TUAW Element Case to give away.

The phone is secure in the case because you have to unscrew the bottom of the case, slide the phone in, and put the screws back in. There are ports along the sides that allow you to access everything you'd normally need: camera, volume, sync cable port. You can't put the phone in the dock, however. The "flip" lid is a piece of plastic with magnets, and those magnets lock onto the screws. The lid attaches to the back of the case when you need access to the screen -- a nice design feature.

I'm not sure all this protection adds any shock absorption, but the phone certainly feels sturdier with a rigid casing on the outside. For games, the added surface area was welcome, even more ergonomic. Speaking of the casing, you can choose a CNC-machined version with a base in aluminum alloy (fits first-gen iPhones), but my model was the "Liquid" edition, which is injection-molded plastic (fits both 1st-gen and 3G iPhones). There's a slightly fancier plastic model with some wood veneer on the back, plus a nickel-plated model and a very limited-run of the "CRG" model. The only problem with all this is that several of the cases are for the 1st-gen iPhone only (like the CRG), so you'll have to peruse the shop and see what's available. Essentially everything is limited-run, which adds to the cache value of your case, if that's your thing. No designer case would be complete without customization, and Element Case will custom-engrave a design on the lid or back of your case.

Our sister site Engadget notes that iDealsChina found this rendering of a silicone case for a new iPhone-like device with a smaller form factor.

iDealsChina says the case is "in production," and has many 3D images of a variety of angles. The device may be unveiled during Macworld Expo next month. The site also claims the "iPhone nano" will have three "sensors," a camera, a "mirror screen" and no 3G. The device will allegedly start production on December 20th at a rate of 60,000 to 80,000 units a day.

This falls in line with unsourced rumors of a wireless product slated for announcement at Macworld. It could wind up being the magic $99 Walmart iPhone that we've heard so much about.

The look of the new iPod nanos was leaked (famously by Kevin Rose) earlier this year as a result of a supplier showing off renderings of new cases for the device. According to iDealsChina, "...once one company starts making a mold their information is passed onto other mold companies or accessory companies through a China underground network."

Eco-friendly traveler? Check! Hip professional? Check! Outdoor enthusiast? Check! Hip profess--wait a minute! OK, so Solar Arcadia may not have the greatest product pages around but that does not stop them from offering this environmentally friendly piece of iPhone case awesomeness.

The case is essentially a lithium ion battery pack with a solar panel that doubles as a flip cover for the iPhone. The construction is said to be leather, however I cannot imagine this being very kind to Mother Nature. There is also an LED status indicator that informs you of the capacity of the case's battery pack when charging and discharging.

The instruction manual notes that an empty iPhone battery can be re-charged in 3 hours when the included Li-Ion battery pack is full. When the battery pack is empty you can set the case to direct charge mode and get your iPhone recharge on straight from the power of the Sun itself!

Note that it does take a full 12 hours of direct sunlight to fully charge an empty iPhone battery, and in December that much sunlight could be hard to come by (at least here in the Northern Hemisphere). However, it is possible to charge the case's battery pack without being attached to the iPhone. So, if you are on a long flight with a window seat it's possible to charge your backup battery while watching the latest episode of Family Guy that you torrented bought from iTunes.

The case may not be the most attractive and is not to be used in conditions where it gets to be hotter than 150° F -- but these things are unimportant. You care about the environment; this is why you bought a Prius and hold the MPG record for your local hyper-miling club. Now get out there and begin harvesting all of that solar energy! Besides, there isn't a wind-powered iPhone case available... not yet, anyway.

Thanks Kirk for sending this in!

The Invisual iPhone case by Critica is unique, having been designed for the blind and visually impaired. It encloses the entire device and features bas-relief buttons that coincide with a modified home page (you'll have to shuffle some icons around first). The coolest thing is that Critica claims it doesn't interfere with the screen's touch sensitivity or performance at all. The high contrast when the backlight is engaged will benefit the visually impaired.

It's just a prototype right now, so no release or pricing information is available. Critica has also stated that a forthcoming application will contribute to its functionality. If we hear any more about this unique case, we'll let you know.

Back in April, AT&T announced the Text Accessibility Plan's (TAP) for iPhone and iPhone 3G, which was designed for deaf users as well as those who are hard of hearing.

[Via Apartment Therapy]

My buddy Gavin Baker, CEO of Abunga, took three iPhone cases from Marware for a spin. He took a look at the SportGrip ($14.99), C.E.O. Glide ($24.99) and the C.E.O. Premiere ($34.99). Which best suited this CEO on the go? Read his take below for the answer...

I first tried out the Marware SportGrip, the silicone case that has a rubberized feel and covers the back and sides of the phone leaving the touch screen open. This was my go-to case for about 2 weeks. It easily protected the back and sides of my phone from scratches and the material deadened any type of accidental drop of the phone, reducing the damage inflicted. I had no fear about tossing my phone around onto tables, chairs or in my Jeep. The downside is that the protection afforded by the cover also creates a much bulkier pocket profile. This made it more difficult to slide into pockets. One major downside was that I took the cover off after about 1 week and noticed it had collected a lot of dust, dirt, lint, etc. on the inside of the cover, creating some smaller scratches on the backside of my phone. I'm sure had I taken the cover off more frequently this wouldn't have been an issue.

The Marware C.E.O Glide was next on my list and it didn't make it long; partially because of the red snakeskin cover, but it is essentially a vertical sleeve with a Velcro clasp to keep the phone inside. It's not functional for me since I prefer my phone to be in my pocket and easily accessed or on my belt. This was a mix of the two and a cover that doesn't work in that circle isn't the best for me.

The Marware C.E.O Premiere is the last case I tried out. It is a horizontal belt case and allows easy access to the phone while providing a secure environment. As soon as I put the case on I was very confident with it. I wasn't worried about the case falling off my belt, and the case has a Velcro enclosure to ensure the phone stays in the case. The interior of the case is soft but not microfiber so I have no fear of putting my phone into the case and it coming out in worse shape. I've used the case daily for about 2 weeks and the exterior of the case shows minimal wear. My only complaint about the case is the Velcro closure. In the weeks I've used it the Velcro has started to loosen and is not as tight as it once was. Other than that the case has been phenomenal and it is the one I've settled on for everyday use.

All of the Marware products come with a cleaning cloth and protective film.

Thanks Gavin!