Gripshift is officially coming to the XBOX 360 and it is coming in December, at least according to IGN XBOX 360.
http://xbox360.ign.com/articles/837/837991p1.html
http://xbox360.ign.com/articles/837/837991p1.html
GripShift Heads to Live Arcade
Chalk up another title for the XBLA.
by Erik Brudvig
November 27, 2007 - Gripshift, the arcade racing puzzle game that first released on the PSP back in 2005, is on its way to the Xbox Live Arcade. Though the game was released with visual updates and online multiplayer to the PlayStation Store earlier this year, the Xbox Live Arcade release is being hailed as the "definitive" version by the developers, Sidhe Interactive.
Like the PS3 version before it, those dropping the Microsoft Points on the Xbox 360 will find 120 challenge mode levels and updated graphics. 360 owners can also look forward to achievement points, leaderboards and four player online racing and deathmatch modes.