That sounds like a pretty sweet deal for people new to the system.
I probably would have switched Forza 2 out for something like PGR3 or DiRT since they have less of a learning curve. I'm surprised they did Marvel: Ultimate Alliance. I would have thought they would want to do all Microsoft Gaming Studio games for financial reasons...something like PGR3 and Viva Pinata or Forza 2 and Kameo.
It would be great to be able to package Gears of War or Crackdown...but I'm assuming they are shying away from Mature products.
Still, this should definitely help them move units in the fall.