supercomputers selling cheap

According to this article,
"Virginia Tech's decision to build a supercomputer out of 1,100 Apple Power
Mac G5s -- a true break from the architecture of traditional, mainframe supercomputers
-- allowed the university to cut its costs in half. According to
researchers, the supercomputer represents a new model for ultra high-end computing
in science and research."

Of course I'd love to see it running on Windows.... but I'm mostly wondering
what other non-traditional applications there might be for supercomputing now that
it's going cheap??