prgmr.com - Linux and NetBSD Xen VPS hosting.
http://prgmr.com/xen
"We don't assume you are stupid."
Golden's Rules: Why new chips + Xen = dream machines
http://searchopensource.techtarget.com/columnItem/0,294698,sid39_gci1176065,00.html
"I can use Linux as my main operating environment and still have the option of Windows available to run applications not yet ported to Linux."
Julien Danjou - Run your entire network on a single server: Xen
http://julien.danjou.info/xen.html
"I decided to stop that, and to run my all network into a single machine, using virtual machine."