According to DigiTimes, we'll be seeing both AMD Thuban and Intel Gulftown six-core desktop processors hitting in just a few short months.
It's all from anonymous sources, but at least on the Intel side the information matches up with what we've seen previously. Gulftown (aka the Core i7-980X) will apparently be available as early as this March, although at a hefty $1,000 or more per chip. Gulftown is also rumored to be the processor for the next Mac Pro, so it's encouraging to see it nearly ready to debut.
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On the AMD side, you'll have to wait a little longer. According to DigiTimes, the Phenom II X6 1075T, 1055T and 1035T, all 45nm process chips, will be available in May. [DigiTimes]