It shouldn't be too hard to think up the categories. We could have the usual "bitchiest", "fanatical", "hypocrite", etc., awards. Also, maybe something along the lines of "best all-round poster", "best supporter of his/her tennis fave", "most conspicuous traitor", etc. Also, we could break it down further, say 'best Monica fan', 'nicest Monica fan', etc.
Problem is...there's too many members to decide who wins what.