More iOS 5 features exposed to public . In iOS 5 beta versions, there are few features available for use :

1. FaceTime over 3G: FaceTime is finally available via 3G ! but this feature can be disabled by carrier, as it will increase cellular data usage a lot .
2. Play iPad2 contents on TV: Videos in iPad 2 can now be played in HDTV , via Apple TV and WiFi.
3. Full HD Video Sync to iPad 2: Full HD (1080p) videos can be synced to iPad 2. Is this imply that resolution of next generation iDevice will have full HD resolution?
4. Audio Information via Bluetooth: If your car radio has Bluetooth, audio information, like album and track, from iPod can be transferred to the car radio.

Source : Engadget