There's a new Halo preview at IntelGamer. There's not much in the way of new information, but the second to last paragraph does make an interesting statement:

All in all, my biggest concern at this time is the release date, which has been bandied about quite a bit, especially amidst rumors that Microsoft is withholding release of HALO until the X-Box is released, which will then come with HALO as an in-box game. (are you confused now?)

Interesting, isn't it? It wouldn't be surprising, though, if we do see Halo packaged free with the X-Box. HBO was the first to post about this item.