Sun Microsystems this week released VirtualBox 3.1, including several key enterprise features aimed at maintaining minimal downtime on virtual servers. VirtualBox 3.1 has the ability to “teleport” virtual servers — move running virtual machines uninterrupted between disparate hosts on different operating systems and computer classes. It also includes a full suite of enterprise hypervisor features. In addition, VirtualBox 3.1 offers more powerful snapshotting features that help administrators move a virtual machine backward or forward in time to any arbitrary snapshot state.