Check out this Tom Bihn bag for easy screening.

http://www.tombihn.com/page/001/PROD/300/TB1701

Also, there are a lot of discussions on laptop bags in the technology forum, including this bag. I suspect a search there would turn up a lot. Laptop bags specifically are a bit of a topic overlap between the two forums. I believe that ScottC, one of the moderators of the Travel Tech forum raved about this bag, but I could be mistaken on that. It looks very nice though.