OpenBSD as Xen domU

[NetOne - Doichin Dokov]

I'm looking to replace a Linux domU with a BSD one, preferably OpenBSD. 
Anyone any success running stable OpenBSD (FreeBSD would also suffice) 
as domU in a Xen system? If so, willing to share config / how-to / 
experience?

Kind regards,
Doichin