Better news is that one of the people reading the Fedora list is Adam
Williamson. I think that's the same Adam as has the 'happy assassin'
site I just linked to; it seems from these links that he has been
trying to solve this problem in F10, F11, and F12. He may know what
the situation is for F13 (and F14).
You can get Adam's drivers for Poulsbo here
http://adamwill.fedorapeople.org/poulsbo/13/ . I have no idea what
the current state is for them. RPMFusion also packages the poulsbo
firmware and drm drivers, again I don't have the hardware so don't
know their current state.
Jon