Orion Trekker II
If you're carrying a lot of camera gear, a more photo-specific pack might be the ticket (on the downside, those packs also can scream, "Expensive camera gear inside!"). Lowepro's Orion Trekker II ($60; www.lowepro.com) manages to be somewhat discrete while providing room for a digital or film SLR, some lenses, MP3 player, extra clothes, and other travel essentials. It has adjustable interior partitions so you can adapt it almost any way you want. The design cleverly houses your camera doodads in a zip-open, padded lower section, which helps distribute your heavier clobber in the proper place and better protects your expensive gadgetry. A good choice for travel, in my view.
Check out Outside's brand-spanking-new Gear Blog for a review of Mountainsmith's line of new camera bags, among other pieces of the latest outdoor swag.