U.S. Air Force Built 500 Teraflop Supercomputer With 1760 PlayStation 3s Posted by mrpixel on Thursday December 16, 2010 @03:07AM from the af.mil dept. http://www.af.mil/news/story.asp?id=123233543 ( 1 comment | 3 points | on HN )
http://news.ycombinator.com/item?id=2000040 - techeye.net - Many comments
This source is probably more definitive.