As we’ve noted, when it comes to the top open source stories of 2012, it’s clear that one of the biggest is the proliferation of tiny, inexpensive Linux-based computers at some of the smallest form factors ever seen. And, the diminutive, credit card-sized Raspberry Pi, priced at $25 and $35, is one of the most widely followed of these miniature systems. People are putting all flavors of Linux and even Android on the tiny computers, and now news comes from the University of Southampton that Professor Simon Cox and his team of researchers have lashed together an actual supercomputer made of 64 credit card-sized Raspberry Pis using Lego pieces as the glue for the cluster.