I wonder if it's possible to make decent bluetooth cameras? That feels more useful to me. A tiny camera you point and shoot that sends pictures/video to the giant iPad screen.
The latest bluetooth standard (from april of last year) supports transfer speeds of 24Mbit/s according to wikipedia, so yes. Unfortunately for manufacturers, there's a bit of a chicken and egg problem there.
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).