I've just attended a presentation by Sun Microsystems regarding VirtualBox. There are some new features. At this moment, VirtualBox 3.0.8 is available. New features of 3.0.8 - 64-bit Guest Operating Systems on a 32-bit Host. Limited to the AMD Hardware Virtualization (AMD-V). - More than 2 TB of Virtual Storage - IPSec over NAT - Host-only Networking (some very complicated networking thing) VirtualBox 3.1 is going to be the next major release, which is going to support EFI. If they can get HFS+ working in the EFI, they can run Mac OS X as a Guest OS. It can't be promised, and IF it should work it's only going to be OS X Server, due to licensing stuff. Other features for 3.1 - HD Video Acceleration - More reliable network infrastructure - Faster I/O interface VirtualBox Web Console A new feature that is currently available as experimental on Google Code, is VirtualBox Web Console. It allows other computers to access VirtualBox on a computer via the web browser to launch existing Guests and add new Guests. It uses Python on the Host and AJAX in the Web Browser. With Microsoft Remote Desktop you can now connect to a Web Console enabled Host, to remotely control any guest Operating System.