Sure, you can count me in. Never played either of the AC games, so I may as well start with the first. It'll also give me a chance to see how well Microsoft's download service works should I decided to get something from them at some point.
Thanks for the opportunity, OP. And good luck to all who enter.
I want to win, because it is obviously a free game but also because I have never actually used GFWL to actually download a game, so I want to see if there are any weird ass restrictions they have.