Zavvi.com have a sale on every Monday (hence the name Meda Monday) which is worth bookmarking and checking out as you can get some good bargains both xbox 360 game wise and in general. More information on the sale here.
Highlights of the sale for 10th May 2010 include the following:
Forza Motorsport 3 is the definitive racing game. All 400-plus cars in the game have been built with more than 10 times the amount of polygons as Forza Motorsport.
Batman: Arkham Asylum exposes players to a unique, dark and atmospheric adventure that takes them to the depths of Arkham Asylum – Gotham’s psychiatric hospital for the criminally insane.
Originally titled Halo 3: Recon, the new game brings the perspective of new characters to the Human-Covenant struggle, as it explores the ODST, or Orbital Drop Shock Troopers.