Peer fun rules ok!
This is a presentation from the Games for Health Conference 2009 that I was lucky enough to attend. It's about Active Gaming (or exergaming if you prefer) - that is using computer games for exercise.
One criticism of active gaming that I hear sometimes is that there's no social interaction, not like real play or sports. Active gaming is not an replacement or an outsider to those activities, it's actually an integral part of both play and team exercise, and this excellent insight shows the social aspects.