Yes, I suppose you *could* tell the video camera to record from its firewire port, but you would need to actually custom-build a device to somehow issue these commands over firewire. That means you'd have to have another gadget between the iSight and the camcorder that has at least some sort of computing power, and has been specially built for the task. A nice project for an electronic engineering student to try on the weekend, but not for the likes of us mere mortals, I'm afraid.