[Hampshire] Converting real servers to virtualised ones

Whilst we're on the virtualisation kick, here's a new thread!

At work we have a few (primarily Windows) servers which don't really do
very much. They are ideal fodder for virtualisation. We are currently
running a Xen server with Linux domUs but bootstrapped these from scratch.

I know VMWare has a utility to convert physical hosts to VMWare virtual
machines (or just disk images?). Can one convert a physical server to a
disk image or partition for use with Xen? Or do other virtualisation
solutions support this better?* The server supports VT on the CPUs but
should run headless without X.

Cheers,

Tony

* With the vagueness about Xen's future I'm not adverse to trying other
virtualisation solutions as long as they perform well.