They both were recently update, so I just don't think that Apple will update them again so soon.
I don't know why you consider the macbook update recent. May 15th, 2007 was the last update. It has been 161 days as of today. If we assume that the macbooks will be released sometime after Leopard, and on a Tuesday, we come to the following:
Tuesday, October 30th: 168 days
Tuesday, November 6th: 175 days
Tuesday, November 13th: 182 days
Tuesday, November 20th: 189 days
Tuesday, November 27th: 196 days
The 27th is the last Tuesday before Thanksgiving, and hence Black Friday, when the Christmas season begins. Since we know that the macbooks have been on a 6 month update cycle since their release, it's a fairly safe bet that they will be updated at some point after 180 days. November 13th looks especially promising, but it might be moved to November 14th, because the 11th is Veterans Day.
The macbook pros are a different beast, but I believe that we will see a minor speed bump(that might include better HD specs) and/or LED backlighting in the 17" before Christmas. I know it wouldn't be much, but it would be enough to give shoppers a reason to pick one up in lieu of a PC.