NetAPP apparently had a christmas present for the BSD community named BHyVe (Beehive)
http://wiki.freebsd.org/201105DevSummit?action=AttachFile&do=get&target=BHyVe.pdf (btw… what the f*** is it with wordpress and randomly broken formatting… links… stuff?
It runs using HVM on Intel, the key difference to running a Xen PV FreeBSD domU is that it’s actually working 🙂 A port to AMD Pacifica is on it’s way.
Looks like a very lean and simply solution & nice to have.
(Note: FreeBSD HVM is of course no problem anymore)