Very nice! Next step: steer users to where they can get the produce. I would suggest teaming up with Community Supported Agriculture [1] where people can buy stuff right off the farm with subscription.
That's why my friend started Market Wagon[0] which acts as a middle-man between farmers who have crops and people who want to buy the food. The experience is like shopping on Amazon but you're buying local.
This is very location specific to NYC but I've always used this site to get local farmer's market info: http://www.whatisfresh.com/