Apple Launches iPhone 3GS At 2009 WWDC
As expected, Apple, in conjunction with AT&T, has released the latest revision to its iPhone line, titled simply the iPhone 3GS (where the S stands for speed) at the company’s World Wide Developer Conference (WWDC) today. This looks strikingly similar to the existing iPhone 3G, but the new iPhone differs in a few key areas. Internally, the iPhone 3GS contains entirely different hardware, and as such the main interactions with the phone are at least 2x faster than with the previous iPhone. The iPhone 3GS also supports HSDPA networks for up to 7.2Mbps downloads.
The biggest plus with the latest iPhone is the updated 3MP camera with autofocus and touch-to-focus. Other advanced features include voice control, digital compass, better battery life and talktime, 10 hours of video playback and 9 hours of WiFi browsing. The availability date of the iPhone OS 3.0 worldwide is June 17. This also contains useful updates, such as device-wide search feature, built-in GPS, better iTunes feature and so on.
The tethering support, which allows the user to connect the device to a Mac or PC with Bluetooth or USB to share internet connection with the computer is one of the best thing about this facility. On launch, 22 carriers will support this tethering feature. MMS support will be included as well, with 29 international carriers supporting this feature.

Apple iPhone 3G S
Source: MobileBurn