Has anyone tried running VirtualBox (or other virtualization software) on the 11" Air? If so what was the experience like? I'd like to get one, but that questi

Has anyone tried running VirtualBox (or other virtualization software) on the 11" Air? If so what was the experience like? I'd like to get one, but that question has stayed my hand so far. I'd like to be able to run a virtualized Ubuntu instance and am wondering what effect the processor speed would have. I'd spring for the 4GB Ram but there's nothing I can do about the processor speed.