There is a relatively new podcast site called Retrovore.com: The Union Square Market Report. Its producers recently recorded a couple of us at the Windfall market stand. The site's subtitle states "weekly news you can use from the New York City Union Square Greenmarket." It's the best produced material on the farmers market that I've come across on the web. On the site you can learn about farmers that don't use any chemicals, including "organic" ones, in their growing process. You can also subscribe to the Retrovore podcast from iTunes and get the full audio and visual experience!