I decided to use the long weekend to break in VMWare Server RC2. As per the release notes, I uninstalled GSX Server and rebooted prior to installing VMWare Server.

Impressively, it didn’t require another reboot, and appears to be fully compatible with my old VMs.

According to the admin guide, in order to take advantage of the new features in Server, you have to upgrade the virtual machines. This changes some of the virtual hardware, so may have some implications for the behavior of the guest OSs.