Sun today released VirtualBox 2.0.2, a maintenance release. Check out the changelog (link below) for a list of changes since VirtualBox 2.0.0. VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. It is the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).
Presently, VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista), DOS/Windows 3.x, Linux (2.4 and 2.6), and OpenBSD.