According to Apple Insider, the next MacBook pro (equipped with Intel's Penryn processors) will have a larger trackpad that will support the multitouch input as found on the MacBook Air. The processors with run at 2.5 GHz for the entry level, and 2.6 GHz for the higher performance 15' and for the 17'.
They do not predict a date when these machines will be available. It will certainly be in the coming weeks, maybe at the beginning of February, leaving time for the press to finish with the MacBook Air story. Apple likes to spread out the launches of its products so that there is a continuous buzz surrounding its brand name.
[translation by crispin]