An introduction article about the Cell Processor, the one inside all Sony's playstation 3 consoles.
It's an insanely complex chip with about 250 million transistors (Pentium 4 has 125 million) that runs at more than 4GHz.
According to IBM it can complete 256 billion floating-point operations every second.
More info here: http://www.gamasutra.com/features/200607 13/turley_01.shtml