I remember seeing this on the net quite a while ago. Another nifty idea that has dissappeared in obscurity. Reminds me of the TINI range.
Perhaps this could be of assistance
http://www.dontronics.com/vicuni/index.html
http://www.dontronics.com/vicuni/mother.html
I think the fact that the socket originally used is no longer used on PC motherboards could be a major negative for this design.