Flight recorder

I came across a post looking for ideas on recording in flight. I've recently talked about trying to setup just such a system. Mentioned in the comments on the post above is the Firestore FS-4 which seems like the ideal recorder for this sort of thing. In my case, however, I'd like the camera mounted externally to be essentially disposable - i.e. I don't want to spend hundreds of dollars.

The ideal setup would seem to be a method of connecting an iSight camera directly to a Firestore FS-4 without needing to have a computer to attach the iSight to. And I'd like to be able to record audio as well (plug into the intercom or put a small microphone in the ear-cup). The bullet and lipstick cams look interesting but still rely upon relatively expensive equipment (cameras) inside the aircraft that would also need to have tapes changed during flight - not something that is possible in the application I'd like to experiment with.