Taking a moment away from E3, Major Nelson updated his blog to give the latest information on Xbox 360 backwards compatibility. The whole list of new titles can be found after the break, and you can always go to Xbox's site to get the full list.
This would typically be the part where we'd say something about how silly it is that the Xbox 360 has backwards compatibility issues in the first place, but now he's not the only guy in town with a problem. There aren't that many original Xbox games that are still worth worrying about. Our concern is more with the new version of the PS3 which will have "limited backwards compatibility," especially when there was nothing limited about its compatibility before. Oh well, if you're planning on getting the PS3 and you have a favorite old game on the system, make sure to check it will still work -- or got get yourself a current PS3 model while you still can.