Rock Band DLC (Tuesday) – X: Blue Spark – X: The Hungry Wolf – X: I Must Not Think Bad Thoughts – X: Los Angeles – Little Fish: Am I Crazy (free) – Little Fish: Bang Bang (80 points) – Little Fish: Darling Dear (80 points) – Ace Frehley: Outer Space – Carrie Underwood: All-American Girl – OneRepublic: Stop & Stare
XBLA (Wednesday) - Game Room (the application is free, but the actual games cost money)
Guitar Hero 5 DLC (Thursday) – Motley Crue: Girls, Girls, Girls – The Go-Gos: We Got the Beat – Night Ranger: Sister Christian
It's coming soon (November 3), and it has Lego David Bowie and Lego Iggy Pop. If you just want the songs, you can buy the disc and pay an extra $10 (800 Xbox points) to copy them over to your normal Rock Band game.