Just had a really nice pow-wow with farmers' market consultant Vance Corum. If you're a farmers market board member, manager or growing for market and you're looking for someone with proven results to help you grow your business, he's the man you want to know. 

Here's a link to his LinkedIn profile:
http://www.linkedin.com/pub/vance-corum/10/767/6b3

He's also written a great book on the business of farmers' markets:

http://www.growingformarket.com/store/products/29