While prowling around for iSight related goodies, I found this somewhat frivolous but in-depth article at MacDevCenter. It covers pretty much everything you would (and a lot you wouldn't) expect to do with an iSight. A lot of great stuff, but for me the highlight was iChat Streaming Icon, which among other things can turn your buddy icon (as it appears to your buddies) into a video of yourself! It's tiny and slow, but it's live! No more need to set an 'away from keyboard' message, they can see from your icon that you're not sitting in front of your Mac!