Here's the Marketplace Schedule from the week beginning 22nd April 2010 - direct from majornelson.com....
Xbox LIVE Deal of the Week
April 26: The Dishwasher: Dead Samurai, 400 points
April 29: BioShock 2 Game Add-on: Rapture Metro, 800 points
Xbox LIVE Games on Demand
April 27: Shrek the Third (All regions except Japan)
April 27: Far Cry (North America)
April 27: Kane & Lynch: Dead Men (North America)
Xbox LIVE Arcade
April 29: Tecmo Bowl, 800 points
April 28: Game Room: Super Breakout, Pitfall!, Megamania, Night Stalker, Rack 'Em Up, Realsports Volleyball, Basketball.
Xbox Avatar Marketplace
April 22: Saints Row 2
April 29: Diesel
Xbox 360 Game Add-Ons
April 22: Left 4 Dead 2 The Passing
April 28: Mega Man 10 Game Add-ons: Endless Attack mode, Special Stage 2 and Special Stage 3, 80 points each.
April 29: Just Cause 2 Game Add-on: Black Market Aerial Pack, 160 points
May 3: Zombie Apocalypse, 400 points