http://www.9to5mac.com/51276/ipad-2s-facetime-app-leaked-video
(Screenshot, click on link below to watch the video)
http://www.youtube.com/watch?v=B_oioMd5qMk&feature=player_embedded#
"As we previously noted, the new iPad will feature an updated FaceTime logo, that is different than the one currently found on iOS 4.2-rocking iPod touches. When a FaceTime call comes in, your iPad 2 will ring and you will get a popup alert on your lock screen, or on top of the application you are currently working on.
Back to the actual interface, the FaceTime controls (end, mute, etc.) will be found on a floating window towards to bottom of the devices display. The current iPad 2 does not have a camera and that is the reason for the lack of a camera preview on the lock screen when a FaceTime video call comes in, and when the user is actually FaceTime chatting. You will notice the above video is in Italian, but the concept is relatively the same."

(Screenshot, click on link below to watch the video)
http://www.youtube.com/watch?v=B_oioMd5qMk&feature=player_embedded#
"As we previously noted, the new iPad will feature an updated FaceTime logo, that is different than the one currently found on iOS 4.2-rocking iPod touches. When a FaceTime call comes in, your iPad 2 will ring and you will get a popup alert on your lock screen, or on top of the application you are currently working on.
Back to the actual interface, the FaceTime controls (end, mute, etc.) will be found on a floating window towards to bottom of the devices display. The current iPad 2 does not have a camera and that is the reason for the lack of a camera preview on the lock screen when a FaceTime video call comes in, and when the user is actually FaceTime chatting. You will notice the above video is in Italian, but the concept is relatively the same."