I came across a really neat feature I haven’t used before on www.localharvest.org today. It’s an events calendar that lets you type in your zip code and a radius of how many miles you’d like to search (10, 50, 100, 500) and it will show you a lot of what’s going on with local food. Some of the events listed are opening days for CSAs and farmer’s markets, sales, demonstrations, and other events. This is what’s happening within 50 miles of Chicago currently: http://www.localharvest.org/events.jsp?t=0&rad=50&zip=60660&send=go.
You can also sign up for an email newsletter and participate in their forums, so be sure to check it out!