I just wrote a little review of my favorite camera backpack, the MindShift Rotation 180 Pro in a recent blog post, where I travelled to Africa and Bolivia with it and was constantly amazed at the functionality and thought put in to the design of this pack. I commented that I actually feel it can make me a better photographer. Read the post to find out how.
And...they just released another version of their MindShift Packs, the Horizon, featuring the cool rotating hip belt/pack. It's a bit smaller than the full-sized Professional model I have, but also includes a small laptop pocket, tablet sleeve, room for hydration, and of course, camera gear. If you want the ultimate camera travel backpack, I highly recommended the MindShift line.