BoneThugND writes "I found this article on TNL.NET. It takes information from the S-1 Filing to reverse engineer how many machines Google has (hint: a lot more than 10,000). 'According to calculations by the IEE, in a paper about the Google cluster, a rack with 88 dual-CPU machines used to cost about $278,000. If you divide the $250 million figure from the S-1 filing by $278,000, you end up with a bit over 899 racks. Assuming that each rack holds 88 machines, you end up with 79,000 machines.'" An anonymous source claims over 100,000.