The one thing I have come across in the past 6 months of watching brands try to fit themselves into the Facebook mega-trend is that – if you can, make a game, do it, do it, do it. Everyone likes a fun game. If you look at the top apps on FB they are all about screwing around and having fun. The top 24 (active users) consist of social fluff, games, and a few cool apps (iLike). If games are not appropriate remind your marketing hanchos that for the vast majority of brands out there, making a Facebook app is an exercise in positioning more than anything else. When your app has 134 active users people might wonder why you spent thousands of dollars making it :) That is all.