From the same source as this possible leak comes a few shots of what could be iPhone video chat. The light source looks off, but supposing it's real, notice it's on Wi-Fi, not 3G, like Skype and SlingPlayer.
This supposed video chat UI is also a little busy with buttons, but this could be a way for Apple to scale down the res without making it too noticeable. Again, these are totally unconfirmed, but maybe, just maybe, they're real. , thanks Brendan!]