...I can not wait until tomorrow...
I converted and imported the ova file into my Xenserver cluster

So far, in HVM virtualization mode, works fine.
Obviously nics and disk controllers are emulated:
tc@wanos:~$ ethtool -i lan0
driver: 8139cp
version: 1.3
firmware-version:
bus-info: 0000:00:05.0
tc@wanos:~$
... so I'm not expecting lightspeed performance, but It's good starting point !
Massimo