Jeff, let me investigate about this possibility.
The 1.0.beta10 release includes a Kernel compiled with the XEN support. In any case, I was not able to start the CompactFlash version in a XEN host and I do not know why. Could you tell me if you are using the unmodified Kernel of Zeroshell or a generic domU Kernel? Do you use para virtualization or fully virtualization?
Regards
Fulvio