I've thought about creating a clever Facebook app and also possibly creating a group to go along with it. If it catches on, the group might become popular and then maybe I could use it somehow to promote certain sites or something like that. I haven't really thought the idea out completely.
there was a clever one that provide IQ test, after you finish the test, you get a score and a link "receive a detail report for your IQ score" and of course that a aff link that bring lead. That app is quite popular and i believe he is making nice profit
Just saw on the news the other day i think Stanford Uni offering a course on developing facebook apps. Was talking about parents paying 20,000+ a year for their kids to be studying it. If that is the case, i would definitely say there was money in it.