I just ordered a replacement for my current laptop bag; I've had a Timbuk2 Commute for the last couple of years, but ever since I picked up a Macbook Pro back in June, getting it in and out of the bag has been akin to making the bag give birth. I got fed up and started looking around for a replacement - I wasn't just looking for a laptop bag, I needed something for classes / going to the lab / traveling and decided to stick with the same company. I went hunting this evening and lo and behold, found what I'd decided on - Timbuk2's standard messenger bag, medium, and their quilted laptop sleeve - for less than i'd pay for the messenger bag alone from the company.
So, I've got a new bag winging its way to me and I should think about offloading the old one...