iPod Touch 4G Does NOT Have Vibration
Apple's newest iPod Touch does not include a motor for vibration. TouchFans apparently mis-identified a microphone for a vibration motor on the FCC photographs. Meanwhile, Apple has changed the text on the iPod Touch's Facetime page to remove the vibration reference.
The original text: If somebody wants to start a video call with you, youll receive an invitation - along with a vibrating alert - on your iPod touch asking you to join. Simply tap Accept, and the video call begins.
It now reads: If somebody wants to start a video call with you, you’ll receive an invitation on your iPod touch asking you to join. Simply tap Accept, and the video call begins. Vibrating alerts have been an iPhone-only feature and has also been used as force-feedback method in certain games.