Comment 10 for bug 367553

Well you could download the karmic .deb files and install them manually for now:
http://launchpadlibrarian.net/26333192/libdmraid1.0.0.rc15_1.0.0.rc15-7ubuntu1_i386.deb
http://launchpadlibrarian.net/26333189/dmraid_1.0.0.rc15-7ubuntu1_i386.deb

They _should_ install fine as I dont think the dependencies have changed.
It will update to the repo version when it is available.
Also you need to enable the backports repo.