Man I forgot to post this.
Plasma is already running on a server: http://www.maluku.de/plasma
And it is available for review and/or help under http://plasma.sf.net. Check the SVN trunk.
I’m currently working on the most awesome skin for plasma, full AJAX (well more AJAS, because it uses SOFU) usage, window management, drag&drop for items and a lot more. Can also be found in the Subversion trunk, the skin is called PlasmaOS.