I have built latest virt-p2v and virt-v2v packages for Fedora 14, 15, 16 and Rawhide. These are highly experimental and may not work, but please help us to try them out.
For virt-p2v you have to run
virt-p2v-image-builder. For more details see the virt-p2v and virt-v2v home page.
If you find problems, join us on
#libguestfs on FreeNode, or post to the virt-tools mailing list.