kongregate.com has a website with a TON of free games.  But more important, developers are trying out new ideas that become parts of games today.  This is where I learned what Towers was, how it was created from WarCraftIII and found League of Legends.

@ comedycentral.com/thanx $5,000, Game Stop Gift Cards, Wii Systems, good stuff. 11/25-11/28 11 am-11pm (12 codes per day, given within the first 15 minutes of the hour & only good for that hour)