I had this idea of a "semi-automated" Moodle test site for some time. Finally I sat down did an "alpha" over the weekend. Here is the outcome: http://demo.syndrega.ch.
The testers here may request for "special treatment", please put a comment in the application form.
I don't know how sustainable the project is, it all depends on community feedback and our ressources. So no promises.
There is a second idea proposed for the best case - the topic of demo sites.
This can be very usefull for people wanting to test several Moodle versions, without having skills and/or hosting
http://demo.syndrega.ch will be taken down on the 30.12. It was not utilized.