My guess is, they won't make that mistake again.
How was it a mistake?

From my memory, the computers that Apple released around the time of Tiger sold very well.
I'm sure they sold a boatload of MBs last weekend, with the new OS release. Imagine what a hassle it would be to process all of those returns.
Somehow I don't think it would be that difficult of a job to process the returns of the people that have bought MacBooks last weekend. Firstly, not all people will bother returning them, and secondly, Apple always sell current stock right up to a new release. I wouldn't base this as a reason that new MacBooks won't be released within the next week or so.
Remember what they did with the final revision of the PowerBook in Nov. '05? They came out with the MacBook Pro that next January!
Apple didn't do any such thing in November of 2005. On the 19th of October 2005, Apple released a
15 inch 1.67 GHz G4 PowerBook that replaced a
15 inch 1.67 GHz G4 PowerBook, and they also released a
17 inch 1.67 GHz G4 PowerBook that replaced a
17 inch 1.67 GHz G4 PowerBook. The only differences were the logic board and slightly larger hard drives in the 17 inch model, but not in the 15 inch model.
The first 15 inch MacBook Pro was released on the 10th of January 2006, that is correct, but the last 15 inch PowerBook that it replaced was not updated on the 19th of October 2005 though. The first 17 inch MacBook Pro was not released until the 24th of April 2006 either, so that was a full six months after the final 17 inch PowerBook was released in October of 2005.
I'm sure there were a lot of people who were pissed. So it makes me wonder... if we just see a slight bump to trigger increased holiday sales, is it best to wait until the new year and hope for a complete redesign?
If Apple releases a new MacBook next Tuesday, which always seemed the most likely date following the release of Leopard and with Christmas coming up, then I don't expect to see a new MacBook update for at least six months.