Apparentluy IBM just developed a chip capable of 500 GHZ when super cooled, and 300 GHZ at room temp. And from what I've read other places they plan on implementing it in commercial products as soon as possible (within the next 1-2 years)

http://www.cnn.com/2006/TECH/ptech/06/20/ibm.chip.reut/index.html