Thank's for the suggestion; I'll check out the HaLVM site once it comes back up.
Alen (author of the post)
I do really like the idea though!
Xen on ARM  support is ongoing and from what I can tell, the repository  is flagged as unstable therefore certainly still requiring work.
[Edit] RaspberryPi has an ARMv6 CPU. The Xen site reads: "The Xen ARM Project, led by Samsung, is responsible for the direct port of the Xen hypervisor to the ARM processor. So far the focus of the project has been to use Xen Paravirtualization (PV) for a range of processors (ARM v5 - v7).".
This means that it should cover ARMv6 of course. As for the status, I have no idea.
Bottom-line. It's really cool to see what this little thing is doing as far as innovation in the market.