My recent server move was necessary because Steve Kemp ended his kvm-hosting experiment.

http://blog.steve.org.uk/kvm_hosting_will_be_ceasing__soon_.html

That was a slightly ahead of its time use of kvm to split a machine amoung a small co-op of users. Some time before that, my server was hosted in a rack at http://www.communitycolo.net/ , which I'm pleased to see is still going. I think there's value in these kinds of hosting sharing things, and I wonder what the next class will look like. Maybe docker will get good enough security that we can all give one-another docker containers using spare capacity on our hosted kvm servers?