ISightNightLight
A nice looking device, which should serve nicely to illuminate those trying to iSight themselves.
A lot of webcam pictures come out looking way tooo dark and horribly grainy – something like this is a good move.
The only problem I can see with it is that you then have a light glaring towards you, something that's guaranteed to give me a headache…
Mind you, if your chat partner(s) complain that you're too hard to see, then this might be a goer for you.