In the ST. LOUIS, MO area:
Black Bear Bakery (Environmental sustainability, neighborhood support, as well as quality, local, and organic ingredients are at the center of Black Bear Bakery's mission)
Riddles Penultimate (Sure you can say your restaurant serves local foods, but since 1985 Andy Ayers has been setting the bar by which other St. Louis restaurants making this claim are judged. Sold to his daughter KT, she continues using the highest percentage of local product possible)
Schlafly Bottleworks (from a Farmers’ Market in their parking lot to SLOWednesday, Schlafly and their Maplewood Bottleworks facility have shown a continued commitment to going slow.)
Sweet Art (handmade, homemade, with love! Made from scratch baked goods and vegetarian/vegan lunch)
Plus numerous farmer's markets on Saturdays as well as Wednesday and Thursday evenings!
Eat Well Guide (Find good food: local, sustainable, organic in the US and Canada)
Slow Food USA (link out to your local chapter to find restaurants "Supporting Good, Clean, and Fair Food"
I just went to a resturant that was established in June 2009 called The 1 and Only Resturant. It is on Old St. Charles Rd. Across from what was once Macy's, Northwest Plaza. They serve all organic and locally produced food. Reasonably priced and tasty too! Near Lammert Field Airport, STL.