Carrier: AT&T
Retail Price: $199.99 or via ebay
Contract Price: $199.99
Hot Features: upgraded 3MP camera, MMS, video capture, faster processor  

The iPhone 3GS is Apple's 2009 upgraded model of their most popular device.  The iPhone 3GS is all about speed (hence the "S" in the name).  Faster processor, faster video, faster data via HSDPA 7.2 (if your non-AT&T network supports it), and video capture backed by more storage.  3GS gets an upgraded camera with auto-touch-focus and VGA video capture, but the big news is software-related: Voice control, support for software-enhanced dock accessories, remote wipe and "Find my iPhone" features via MobileMe, and more.