Share 'Successfully marketed & adopted social networking in Higher Ed'

So this will be my first post in uwebd and I just wanted to say that it looks like a pretty good community and I'll probably be pointing my colleagues here sometime soon. Anyway, on to my vaguely-worded question. I was wondering if anyone could give me an example of universities (or institution, or whatever..) where a social networking solution has been successfully adopted. By this, I don't mea…