A very big thanks to Simon Cox for putting together a very comprehensive guid to buiding a Supercomputer with Raspberry Pis. Make sure to visit his web site: http://www.southampton.ac.uk/~sjc/raspberrypi/
Quick link to a complete PDF guide here !
For some reason, the PDF on the site itself doesn’t seem to be as up to date as this one….
Make sure to visit the site anyway to see all the cool pictures !