Oracle Releases VirtualBox 4.0
VirtualBox is an open source project Oracle has kept fresh. Version 3.2.12 was released on December 1 and the first 4.0 beta dropped on December 6.
Oracle VM Virtual Box 4.0 features a new open architecture for customizing VirtualBox. There's also speed and stability improvements according to the press release.
Originally published on http://www.developer.com.