The stories been pulled but it was here.
http://xbox360.ign.com/articles/708/708431p1.html
http://xbox360.ign.com/articles/708/708431p1.html
E3 2006: Xbox 360 Assassinated
Ubisoft Montreal's Prince of Persia influenced action game may come to Xbox 360.
by Douglass C. Perry
May 12, 2006 - Ubisoft Montreal revealed its next incredible project, Assassins: Creed, exclusively for PlayStation 3 at E3 this year, much to the delight of Sony console fans and to the dismay of Microsoft consoles fans.
A third-person action game in the vein of Prince of Persia, Ubisoft Montreal's newest title shows off the next generation with fantastic texture work, early but promising animations, and newly envisioned levels of Prince/Spider-Men climbing/traversing. But the game, officially, is strictly exclusive to PlayStation 3. Ubisoft officially would not comment on a possible Xbox 360 version.
According to sources close to the company, however, there are potential plans for an Xbox 360 version at Assassins: Creed sometime in 2007. Additionally, Microsoft sources who asked not to be mentioned by name, claimed the demo, hidden behind closed doors at E3, was running on an Xbox 360 using a third-party USB PlayStation controller. The game system was hidden in a stand covered by a sheet. Again, Ubisoft officials would not comment.
We'll have more soon.