I'd like to record some video on my MacBook Pro, which I could do using the built-in iSight except I'd like to record in HD. Rather than go out and buy a new HD video camera, is there any way of getting the Mac to recognise the iPhone 4's HD camera as an input?

Yes I know that I could just use the iPhone on its own and then transfer the video over, but I'd like to be able to see what I'm recording (without using mirrors). Have done a bit of Googling and can't see anything, so just thought I'd ask!