I have used virtualization in many different forms, OpenVZ, Xen, VMWare, for a number of years with great success. One thing I have been interested in doing is moving away from all applications that are not OpenSource. So finding a good solution for the Desktop virtualization has been a process. In that I am now running Debian 4 Lenny for the desktop workstation I thought I would try VirtualBox. When I installed from the Synaptic Package Manager it failed each time because of a necessary kernel module that had to be loaded.