Peter Moore is promising that a list of backward compatible Xbox games will be posted on the Xbox.com site in the next week or so.

In an interview with Game Informer, Moore said that they will probably be in a position to post the list next week but that it will likely be updated as "more and more games get through certification." So don't be freaked when the initial list comes out and Halo or something isn't on there.

X05: Peter Moore and J Allard Speak Up [Game Informer]