Links
GossamerGear
Has plans for making your own ultralight backpacks.
TrailQuest
Features recipies and instructions for baking great tasting food with an alcohol stove. They also have a good bit of info on DIY equipment.
Rockywoods Fabrics
Sells fabrics and hardware for making or repairing backpacking gear.
NetBackpacking
Offers advice about backpacking food from weekend trips to what to bring for the 'long haul'.
Adventure Foods
Sells an extensive assortment of backpacking foods.
PackLite Foods
Small, family owned business that puts a lot of care into the food they prepare for hikers.
ehow.com
Article about choosing foods for cold-weather backpacking.