It seems like I barely get done upgrading to the latest release of VirtualBox
when I hear about yet another new release. That happened again to me a couple of weeks ago, when I heard about VirtualBox 3.1. It run it at work on Mac OS X (I have Windows and OpenSolaris
guest OSs running on the Mac), and I run it at home with OpenSolaris as the host on one machine, and Ubuntu Linux as the host on another.