There's a new online service that's very much like Freecycle, except for produce. (If you haven't heard of Freecycle, it's fabulous when spring cleaning.)
Veggie Trader was inspired by a lemon tree that didn't get picked. People with fruit, veggies, nuts, etc., that they can't or know they won't use, can list it on Veggie Trader, sell it, give it away, or trade it for something they will use. Their hope is that the service will help us all use our collective resources better.
Have two cabbages and no potatoes? You know what to do.