Last week on XBLA: - Tour De France 2009: The Official Game (800 points)
Gold Member Deal of the Week (Monday; 400 points) - Star Wars: The Force Unleashed: Jedi Temple Mission Pack
Retail (Tuesday) - G-Force - Rock Band: Country Track Pack - Watchmen: The End is Nigh (Parts 1 & 2)
Rock Band DLC (Tuesday; 160 points per song or 440 points per pack) * Kings of Leon "Crawl" * Kings of Leon "Molly's Chambers" * Kings of Leon "Sex on Fire" * Rancid "Last One to Die" * Rancid "Ruby Soho" * Rancid "Time Bomb" * Rise Against "Prayer of the Refugee" * Rise Against "Re-Education (Through Labor)" * Rise Against "Savior" * Lush "Sweetness & Light"
XBLA (Wednesday) - 'Splosion Man (800 points)
Demos - Madden 10 public demo (Thursday; for Gold members only) - I think there's a Gamestop exclusive Madden demo out that day too
According to http://en.wikipedia.org/wiki/List_of_video_games_exclusives_%28seventh_generation%29#Microsoft_Xbox_360 , there is also: Crackdown (which was a good game; the sequel was panned because it was exactly the same game). Fable II and III.