thats not exactly correct. i use my isight on stickam using safari regularly.
you need to set up your flash settings (pops up immediately in a white box upon starting the live feed) to use a USB based webcam. We all know your isight isn't plugged into a USB port but if you change that setting to USB camera then it should start working for you.
I tried logging in today to get more specific on the instructions but for some reason it is not recognizing my password. go figure. I will keep trying though.
Billy