AMD's newest roadmaps show that they are planning to release the desktop Toledo dual core 939 pin processor (at 90nm using SOI) in the second half of next year. The Toledo is a successor to the San Diego chip (with 1MB L2 cache) which samples in the second half of this year and that will be produced in the first half of next year. The San Diego is the sucessor to the Clawhammer 939 pin with 1MB cache.
Winchester, the Athlon 64 939 pin 512K chip at 90 nanometres will ship in the second half of this year.
So to reprise, in Q2 05 we'll see the FX57, which follows the FX55, which in turn is the successor to the FX53. The FX55 is slated to emerge around Q4 of this year. AMD will continue to position the FX* family against Intel's Extreme Edition - so price changes will probably march in step.
And the Sempron, originally based on the Thoroughbred core, will move to the Paris 754 pin core soon at 130 nanometres, to be displaced in Q3 by Mr Palermo, who will make an offer you can't refuse in Q4 of this year at 90 nanometres.
AMD is telling its customers its long term strategy is to split Sempr0ns and Athlon 64 as completely different brands, an interesting proposition indeed. Why not just sell the Sempr0n brand to Via?