Ubisoft has waffled as to their statements about exclusivity.
http://www.jolt.co.uk/index.php?articleid=10811
Though Ripten.com claimed earlier this week that forthcoming shooter Haze would be a PlayStation 3 exclusive for life, Ubisoft has stated that, in actuality, the game will be on PS3 only "for now".
Yes, the publisher has taken steps to clarify the situation by telling CVG that's it's not certain that the game will never appear on Xbox 360 or PC.
It could well be the case that Ubisoft is waiting to see how well the game performs on Sony's system before committing itself. Should it go the way of Unreal Tournament 3, then we expect the 360 version would hit the shelves fairly imminently.







