All -
I'm setting up a server for demoing experimental MediaWiki projects, branches & extensions at wikixp.org ; currently there are demos of LiquidThreads and InstantCommons running:
http://wikixp.org/lqt/ http://wikixp.org/ic-client/
The frontpage will be an index to these projects. Let me know if you would like to demo a project of yours there, with or without direct shell access. I will explicitly use these demos for funding proposals and such.