Quoting from this article on the Novell/Microsoft deal:
Users can host Windows Server as a paravirtualized guest on SUSE Linux Enterprise Server 10, using the Xen virtualization technology embedded in the Linux operating system.
Very interesting. The only paravirtualized Windows we’ve heard of so far is the proof of concept the Xen team did at Cambridge several years ago which was protected by NDA. I wonder what the exact licensing terms are — and what mechanism will Microsoft use to (try to) prevent people from running their domU kernel on other Xen installations?