There used to be a MySpace.

Actually, I'm not sure how much discussion is done on any of them really (I rarely log into MySpace... not a fan of it, so I don't know what was posted there when there used to be one), I think it's more for connecting and getting the word out.

I enjoy the social sites, because I've found some Xmarkers on the Facebook page, for example, and added them to my friends list.