I was a little surprised to see it wasn't Universal, especially since their last release was after the first MacIntel machines. Only two explanations I can think of is that Maya was too late in the dev cycle to go Universal (I don't envy those high performance app creators like Adobe and the like AT ALL going to Universal) or that the MacPro wasn't out and they didn't want to put a version of Maya out until they had the pro grade hardware out.