Doritos Crash Course part 2 is free for Gold only. Played a bit last night. Pretty good.
http://marketplace.xbox.com/en-US/Product/Doritos-Crash-Course-2/66acd000-77fe-1000-9115-d8025841124f
http://www.ea.com/dragon-age-legends
So I just saw this today. As far as facebook apps go, looks pretty good but the best part is you unlock in game content for Xbox or PS3 while you play. I messed around with it earlier for about 10 min and unlocked 3 things already. Now I just need Dragon...