This is a not-fully-accurate simulation of 2005 Xbox 360 "Blades" UI. You can switch through the blades with A for Marketplace, S for Xbox LIVE, D for Games, F for Media, and G for Settings. Live Camera Update: You can now simulate Xbox Live Camera (partially) via the Settings menu (if you have a webcam)
I will expand the marketplace someday. More updates coming soon. Ideas accepted. If you run into a bug, please report in comments. Xbox for Blades, Xbox 360, Xbox LIVE Vision, and Xbox LIVE. Microsoft for Xbox, and Windows XP, Rare, Ltd for Kameo: Elements of Power, Bizarre for Project Gotham Racing 2, Activision for Call of Duty 2, Ubisoft for Peter Jackson's King Kong, EA for NFS: Most Wanted, and 2K Sports for Amped 3 J Dilla for People, Mike Morasky (Aperture Science Psychoacoustic Laboratories) for Adrenal Vapor, and DEVO for Whip It