Dude! Check this out. This game is pretty interesting (and quite addicting)
Alexadex
You pretty much buy shares of stock from other websites (like google, yahoo, etc) and compete and like gain or lose money. Of course it's all free and totally pretend (no real money =p) nethertheless quite interesting. Give it a try!
Currently I bought 1 share from kompas.com, 10 shares from animenewsnetwork.com, and 15 shares from animesuki.com. And no you can't buy shares from CAA... yet (that may change later)