Booq recently announced the introduction of its Python XL, a large-capacity backpack suited for the 17” PowerBook and it’s absolutely huge. Don’t carry this one around for hours on a hot day in Bangkok. As with all Booq bags it has great style and an unfortunate premium price ($199US). “In terms of utility, Python is one of finest laptop backpacks available: Waterproof zippers, weather-resistant ballistic nylon exterior and tough, seatbelt nylon staps, a rigid-frame laptop compartment designed to protect the world’s largest laptops, lots of padded pockets and compartments for items large and small, a dedicated iPod pocket with non-scratch lining, a stand-alone removable accessory bag, removable waist strap, sternum strap, and much more.
See more on their site (I would have loved to see a photo of a slr in the bag).