Unfortunately, not much else is revealed, such as a release date or platform-specific content. Most of all, we want to know why they waited to confirm the Xbox 360 version, even though we all knew it was coming. As a developer and publisher, it would be the smartest decision to promote all iterations of the title. Was it to instigate hype, as 1UP's Luke Smith conjectures, or were there even more sinister deals being made behind the scenes?
Assassin's Creed is also coming out for PC and PlayStation 3.
[Thanks to everyone who sent this in!]
[Update: In a press release, Ubisoft has announced that the Xbox 360 version will launch in early 2007 alongside the PS3 version.
GameSpot also has a Q&A with Producer Jade Raymond that sidesteps important questions, such as "why deny the 360 version?" and instead opts for the more generic lead-ins. Assassin's Creed has high-def visuals, audio, and Xbox Achievements? O, thank you, Captain Obvious!]