BigFish Games is offering a free game. It's one of their most popular and is called Mystery Case Files: Ravenhearst. It's usually $9.99 and is available for both PC & Mac. Obviously you won't get any cash back on it, but it is a great chance for you to try out Big Fish Games with no risk.

http://www.sunshinerewards.com/shopping/BigFishGames/

I'd love to have a few of us try it out and play it so that we could talk about it together!