iTunes 7.7.0
The new version of the jukebox software for Mac OS X and Windows systems is necessary to support iPhone 3G, the iPhone 2.0 firmware update, and both downloading and syncing apps from the App Store for iPhones and the iPod touch.
The upgrade also includes explicit support for Apple's MobileMe push data service, which syncs calendars, contacts, and e-mail between the handheld devices as well as Macs and Windows PCs.