Yes, the host is 64 Bit, a Debian lenny with a 2.6.30-1-amd64 kernel and Virtualbox 3.0.6.
I installed the maschine 2 month ago, but i have problems with hang ups.
The guest is running the whole week untill sundays.
On sundays between 0:55 and 5:00 am the maschine hang up. Then i have to poweroff the guest and start it again.
I wrote about this problem here:
http://forum.virtualbox.org/viewtopic.php?f=2&t=23060
And today i looked at the status-site of Virtualbox for supported GuestOSes and was wondering that the Server 2008 is not in the list.
But in Virtualbox itself i can choose Windows Server 2008 64Bit as GuestOS.
So is ist released or not?