A great tutorial about FaceTime on the iPhone by Mike Flaminio

FaceTime is Apple’s marquee feature for the iPhone 4. The video chat service connects two iPhone 4 devices together over Wi-Fi allowing users to share video from either the main or front-facing camera. FaceTime requires no additional setup and when tested, works well within firewalls. Generally audio quality is superior to voice dialing, and video is respectable.

Thanks Mike!