Hello iPhod3G (R.W.T.F.),
Your Macintosh makes all of it’s changes from the System Preferences. Open your System Preferences and check to see that your iSight camera is working, then, launch photobooth. Best of luck.
--Rick
Hello Kaitlin F,
I suppose if you see your friends on your Buddy List that you could simply ask them. I believe that iChat only tells you if they’re on-line and available to chat. Best of luck.
--Rick