I think it will depend on whether the Bluetooth stack is "keyboard only" in the same way the iPhone is "headset only", or whether it's "whatever you want but the App will have to be the driver" so it would need to be a Skype+Camera pairing. Actually, that sounds somewhat unlikely doesn't it? :(
(How would you Skype without it running in the background? You'd have to phone someone to arrange Skyping).
This way you could just 'shoot from the hip', looking down on your tilted tablet like you would look at the screen of one of those old Hasselblad cameras.
The screen is large enough to hold at some distance from your eyes, after all!
That said, people seem to be forgetting all about the camera connection kit. Right now it is for downloading off your camera or memcard (something I wish the iPhone had long ago) but it could support more use cases in the future.