iTunes 8.2 now supports iPhone or iPod touch with the iPhone 3.0 Software Update. iTunes 8.2 also includes many accessibility improvements and bug fixes.
For information on the security content of this update, please visit this website: http://support.apple.com/kb/HT1222
MuscleNerd, an iPhone Dev-Team member writes, "Todays iTunes 8.2 update changes the way your computer talks to the device. This affects things like QuickPwn and PwnageTool when they try to identify whats connected. Also, ssh over usb breaks due to same reasons. Fixes are in the works but for now avoid 8.2. (These are probably *not* anti-jailbreak maneuvers, just Apple changing protocols that normally only Apple cares about.)"