The team at Sun continue to update VirtualBox – 3 releases in 1 month. Of these the 3.0.12 release (November 17) and the 3.1.2 release (December 17) were maintenance releases with bug-fixes, whereas the 3.1.0 release (November 30) was a fairly substantial release containing new features, including Live Migration.
There are two very recent vendor initiatives that hearken back to the days of single vendor tightly integrated systems. The first is Oracle’s pending acquisition of Sun. The second example which has potentially far more impact upon VMware is the recently announced EMC/Cisco Vblocks.