OnLive has reached 45,000 Facebook Likes so they’ve unlocked the deal for Batman Arkham Asylum. For 72 hours only the game is on sale for 99₵ after coupon. Use the promo code 99CENTS at checkout to get Batman AA for less than $1!
OnLive is a cloud gaming service, and you’ll be able to access your games anywhere you have internet access. It’s great for playing games on underpowered devices like a netbook.
EDIT: This is actually the Game of the Year Edition!