Has anyone else tried user-mode-linux?
I've been playing with it and I like it.
It's a host computer that runs many virtual servers within it.
My host is RH9 because I'm masochistic that way.
I have a couple of virtual servers running. One just a bare vanilla Linux with a minumal shell and no services, one a RH7.2. I see various flavors of RH, Debian, and a few others. You can make virtual server templates of any distro and run it.