http://www.gameinformer.com/News/Story/200510/N05.1005.1820.37210.htm
GI: Two of the big questions were launch lineup and then what games would be ready for backwards compatibility. Can you give us any kind of list for the day one titles? When will we find those out?
Moore: You have all heard this before Im sure, but we are working on a software emulation that we have built that is had to hand combat game by game by game. Each game is emulated and you know the issue with the GPU and the CPU. We will probably be in a position in about two weeks to give you a list and that list will go up on Xbox.com and it will get updated as more and more games get through certification.
GI: So out of the box, some games will be playable, thats what youre saying?
Moore: Yeah. And that list will grow and grow and grow.
GI: Will you be charged for that in Marketplace or will that be free?
Moore: There will just be an auto-update that you may not even be aware that happens. Say Crimson Skys becomes backwards compatible. We will post an update on Xbox.com. We may even set up an email alert for people who are interested enough. Bottom line, you will start seeing more concrete information is two weeks. We will post a list. The guys continue to pound through these games and the emulation is working well. After launch, we will continue to do it. Until consumers show lack of interest, then we will move on.