I have done an experimental kernel, which is a standard F15 2.6.38 kernel
plus the two packages needed to get the xen net backend working. In my
testing on an F15 host I could get a guest to boot from a text boot,
though X crashed. The build is at
http://koji.fedoraproject.org/koji/taskinfo?taskID=2968665 if anyone else
wants to test it.
Michael Young