Let's say that one more time: come December 2, you will be able to download full, original Xbox games to the Xbox 360. The initial list of available games includes Fable, Indigo Prophecy, Crimson Skies: High Road To Revenge, Crash Bandicoot: The Wrath Of Cortex, Burnout 3, and, of course, Halo: Combat Evolved.
Games will cost approximately 1200 Microsoft Points, or $15 USD. Microsoft plans on re-releasing as many Xbox 1 titles as possible through Marketplace. Look out, Virtual Console.
Update: The CVG source has been removed, but Eurogamer has posted a similar report, dating the update for December 4th.