To kick off the new year, Intel plans to start shipping its Atom N450 processor clocked at 1.66GHz, which is slightly faster than the 1.60GHz Atom N270. At $64, it's also slightly more expensive by a couple of Hamiltons.
But if you're holding out for a faster Atom chip, you may consider waiting until March when Intel starts selling its Atom N470 chip for $75. The upcoming part will kick things up a notch with a 1.86GHz clockspeed, or 200MHz faster than the N270. That's a pretty significant boost in the Atom world, even if the amount of cache (512KB) remains unchanged.
Both new chips will fit in the same FCBGA8 socket that current netbooks use. That means you can also expect some new desktop Atom chips in the pipeline, though details are scarce at the moment.