Since iPhone iSync: the beginnings of WiFi syncing - The Unofficial Apple Weblog (TUAW)
iPhone iSync is potentially a very interesting application with great promise. It?s a GUI implementation of an rsync-based folder synchronization tool that works with WiFi. This means it will sync a folder on your Mac to your iPhone/iPod touch over the wireless network. In the future, this suggests the possibility of iTunes syncing over WiFi? unfortunately, it?s not quite there yet.