Justin you joined a club? Cool beans.
I'm not sure I need a cross bike but there are a few races/rides that sort of need/recommend them (hilly billy roubaix, mountains of misery) around here and there is also the C&O canal trail across from work which could be fun to ride too. Also it would be nice in the winter. I really should have just gotten the cross bike when I bought the MTB because I think I would have used it more.