[jodrellblank]

It's possible to make a bluetooth camera: http://www.bt-1.com/

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).