From Slashdot, of all places:

Xen Team writes "The University of Cambridge Computer Laboratory Systems Research Group is pleased to announce the open source release of Xen, a virtual machine monitor for x86. [Slashdot]

Looks like PC virtualization is getting more attention. Xen seems to suffer from the x86's lack of native virtualizability--they need client OSes to be slightly modified to work correctly, but it's a nice start. I'll post more comments once I've had time to read their paper.