I've not really used a webcam. Are the feeds pretty much real-time these days? If so I think it'd be pretty cool to hop online and easily find someone to jam with. I play harmonica and have always had fun playing blues with even beginner/intermediate guitarists. Other than that I can't think of anything I'd want to use it for. Maybe it'd be more fun to play backgammon or chess across from a real person rather than a game interface.