It was really easy to manage Virtualbox in OpenSolaris 2009.06.
I have a real license for WindowsXP Home Edition, and it will only be running virtualized from now on. I will use Windows to play poker on the internet, because the support to run a poker client under WINE is not so good at the moment.
I virtualize OpenSUSE as well, so I can read pdf-files using Okular.
Phoronix review: http://www.phoronix.com/scan.php?page=article&item=opensolaris_201002_early
SvaraRadera