http://www.futuregame.com/index.php?r=Aglet
Simple game. Predict whether a stock will be higher or lower after 30 seconds. Get the longest streak for the day and win an Ipod. Longest streak for the month wins a Macbook. You can cash your streak out at any point. Cash out is $20.00.
I haven't cashed out yet so I can't vouch for then at this point but I haven't heard anyone complaining yet either.