Ok...I found a HD pack. About time! New audio and video options appear on the Xbox dashboard when the HD pack is connected. New Audio Options: DTS (yes/no) and DD (yes/no) New Video Options: 480p (yes/no), 720p (yes/no), & 1080i (yes/no). I set mine to 480p 'yes', 1080i 'yes' and enabled both DTS and DD. Then I booted up Halo... There are no options for resolution or widescreen. Halo is a 4:3 game period. I have no way to confirm it's even running in 480p (as opposed to 480i). I can say, however, that it looks a hell of a lot better than it did before (which was already fantastic). I'm guessing it's 480p because I don't know if component cables alone could be responsible for the improvement. Dolby Digital is going to be the best addition to gaming in a long time. I somehow walked past an enemy but I heard him from BEHIND me!!!. A quick spin and he was no more. The effect was very cool. Beyond that, the surrounds are rather subtle which made the sound of the enemy really stand out. Good stuff...anyone know of a launch title that is supposed to be in 1080i? I'd like to see what this thing can do.