Docs are here: http://wiki.blender.org/index.php/User:Theeth/netrender
Should be easy to test if people want too, just follow the instructions on wiki
Code is still very much in flux, so I'd like if people would refrain from making changes (send patches directly to me if you must).
The UI side is very crap, it's basically there just to get things testable. See wiki for known bugs.
