Pro Light Camera Backpack: 3N1-35 PL

This camera carrier works three-fold: carry it on your right shoulder, your left, or as a backpack. It comes equipped with an outer cover to protect from inclement weather when you're on assignment, or if you're just out on an intense photo-walk. And while it's little more than 4 pounds, it still has tons of space, including a side pocket to stash your camera or get to it quicker, spots for your wallet, laptop, and tripod.
[$220-$265; manfrotto.us]