just fyi there are other 2 repository for poulsbo:
https://launchpad.net/~dobey/+archive/ppa
https://launchpad.net/~albertomilone...ulsbo-graphics

i've used libdrm-poulsbo-2.3.0-0ubuntu3netbook7 from Milone's ppa on karmic because the ubuntu-mobile one was not installable (dependencies problem).