There is an XP driver available now :-
But it's a very early release, and almost all acceleration is broken, so hopefully we'll see a proper working driver soon.
Unfortunately 'soon' could also mean 'never' judging by the general lack of support this hardware has...
it's okay, i usually use my comp for work, not for app that use graph acceleration. but i wish intel will provide driver for any os each time they release device.