Sorry to start on a bum note, but I'm still mourning Age of Empires Online.
Lots of other GFWL games are looking at moving to another platform (like Steam) or making their own, but apparantly there are no such plans for AoEO.
Real shame, I really love that game. It's such a great co-op game.
Plus, I did pay for a Greek expansion pack, and I won an AoEO contest to get Empire Points before the shutdown announcement.