Good news. We already have a conversion process for Xen and ESXi in place. The Xen images we've been providing to hosting providers that reached out to us. The ESXi we gave to VMWare for integration with vSphere and the VMWare marketplace but for some reason they've only integrated a handful of appliances.

I just launched our conversion machine on EC2 and will be uploading these images to sourceforge where everyone can get them.