I wouldn't expect any new Macbook or Macbook Pro updates until the Macbook Air can ship and "sink in" to peoples awareness of the product. If they redesign either of the other two it will pry people away from the Air which is not something they want to do at its launch. I expect an update in March at the earliest. Both were updated last on November 1st (even thought the Pro only got a 2.6 Option, Apple counts things like that as updates).
Does anyone really expect new product announcements in the next two weeks? Macworld just happened, and none of the new products are even shipping yet (Time Capsule, Apple TV Update, Macbook Air). The only thing that happened was rentals on iTunes and the iPhone/Touch update.
My advice, if you really need one, then get it because the current models are awesome.
If you really don't need it that badly, defiantly wait because I think the next model will be a redesign versus a regular upgrade.
The only likely hardware difference between the two will the newer Multi-Touch features (it is unclear if the current models can be upgraded with firmware for this purpose) and some minor speed bumps. However, while the Penryns aren't that much faster, they are better for battery life. The new ones will likely get the Macbook Air Keyboard. Possible that a Blu-Ray player may be included, but Jobs again blew off the format war in that recent interview at Macworld. He said Blu-Ray won, but then moved on to talking about iTunes Movie Rentals in HD.