AMD is switching to 0.13 micron in Jan '02. So all of the Palominos and Morgans will be 0.18 micron. Thoroughbred and Clawhammer will be the first AMDs to be made with a 0.13 micron process.
AMD claims that Palomino is on schedule, and if it is then they should be widely available next month. However the Athlon-C's were released in January and they are still hard to find, so I wouldn't bet on AMD being on schedule with Palomino.