Windows/Mac/Linux: If you're a gamer or heavy graphics user of virtual machines, VirtualBox 3.0 has an early beta out that introduces OpenGL 2.0 and Direct3D support. If you have no clue what that means, the release has other goodies, too.
The graphics support for Windows, Linux, and Solaris guest machines are the marquee features in the upcoming 3.0 release, but a lot of other fixes and tweaks are looking to make the cut, too, including a streamlined settings window, better synchronization of shared folders between Linux and Windows host/guest setups, and continued optimizing of virtual processors. The OpenGL and Direct3D additions will, of course, depend heavily on your hardware, and how much video memory you allot to your virtual machines, but it should clear up quite a few compatibility problems.
Hit the link below to read up on VirtualBox 3.0 beta 1 and grab a free binary for Windows, Mac, or Linux systems, and tell us what features VirtualBox needs to add to win over your heart in the comments. Want to get started with the 'Box, but find it all a bit too much? Try our beginner's guide to creating virtual machines with VirtualBox.
VirtualBox 3.0 Beta 1 Released [VirtualBox Forums via Kabatology]