Yes you read that correctly! As of VirtualBox 2.2, Compiz works inside your VM. It works best provided it’s supported on the host. All you need to do is update your guest addons with the newest version and enable Hardware Acceleration in the VM settings. I tested this on a Nvidia GeForce 8400GS M and it works wonderfully. It’s not even slow. It’s just as fast as running Compiz natively. Incredible! Good work to the VirtualBox devs!