Another year and another iPhone has hit the market, this time worldwide, with just as much fanfare as the first model. Though the iPhone 3G adds only a few new features, they're big ones: 3G HSDPA and a GPS. Other improvements include better audio, improved Bluetooth and that nifty new 2.0 iPhone operating system pre-installed, which adds support for 3rd party applications that are easy to download and install via iTunes on the desktop or directly to the iPhone. The phone has a curvy back that feels better in hand and looks great, though it's slippery as heck. The iPhone 3G is a quad band GSM world phone with worldwide HSDPA support, and it's sold by AT&T in the US.