Eat Well Guide
The Problem: You've heard the hype about local, sustainable food, but you can never get yourself out of bed in time for the weekly farmer's market... and you don't know where else you can get products from your local farms.
The Solution: Eat Well Guide. Eat Well Guide tells you about farmer's markets, farms, natural food stores, food co-ops, CSAs, and other sources of local, sustainable, and organic foods in your area. From what I can tell, it is remarkably complete. Farm entries generally include information on products sold directly to the public, as well as contact information.