Sun announced this week the availability of VirtualBox 3, the latest version of its open source virtualization solution. The new version introduces experimental 3D graphics support and the ability to expose multiple CPUs to guest operating systems. VirtualBox was originally developed by InnoTek, which was acquired by Sun last year. InnoTek launched an open source edition of VirtualBox in 2007, releasing most of the program’s code under the GPL. Alongside the open source version, the company ha