Pretty interesting...

via BetaNews article:

"Twice each year, the rankings of 500 of the world's supercomputers are assessed by the University of Mannheim in association with Berkeley National Laboratory and the University of Tennessee, Knoxville. Their figures are then sorted by tested clusters' maximal observed peak performance, in gigaflops."

"Intel-based processors walked away with one, if not two, lions' shares worth of the Top 500 list, with a staggering 354 total systems."

"460 of the Top 500 systems were running one flavor of Linux or another, including all of the Top 10."