The Big BackOffice computer backpack by Shaun Jackson Design is one of the few I've seen recently that I might actually buy. I've got a bandolier style that's been serviceable for the past couple of years, but I really prefer double straps. Most of the stuff I've seen out there are courier cargo bags, which are okay for short trips and light loads. But I tend to carry a couple of books in addition to my TiBook, which adds up quick, and screws up your neck and shoulder just as fast.