Very little overall.  The movie functions are probably the most interesting to me, followed by the music.  But I am disappointed to learn that you can't use last.fm while in-game which makes that feature pretty much pointless for almost every user out there, and I really could give two-shits about the social networking features; I feel they are there for two kinds of people, the casual, and the insecure.  I really just cannot see the reasoning behind why the social features were included, personally.