"Slim" laptop bags (or sleeves) are starting to be all the rage. I love the Slim from Knomo. From the review ...
The cool thing about Knomo bags that really appeals to the geek girl in me is that you can register your bag. Each Knomo comes with a unique number and you can associate it with your contact deets via their website. And then if you happen to leave it at the yacht club after a night of cutting your jib, a fellow mariner can call a toll-free number to report your Knomo's whereabouts.