Small packs with pockets huh? The two manufacturers that come to mind are REI and ULA. The REI pack I'm thinking of was called the Flash, and it might still be around. ULA makes a number of packs, and they all can have waistbelt pockets and plenty of external mesh pockets: http://www.ula-equipment.com/index.htm

If you ever need something waterproof, you might look up these: http://www.outdoorresearch.com/site/browse/Storage%20Systems/Back%20Sacks.html