We found a great Chester County, PA winery yesterday: Black Walnut Winery, which currently produces 5 reds, 6 whites & 2 seasonals (apple wines). The owners refurbished a 200-year old bank barn to include 2 tasting rooms and a wonderful atmosphere for enjoying their wines. Tastings are $6 per person. The winery is located at 3000 Lincoln Highway (Route 30) in Sadsbury Township, which is just past Chester County Airport, headed west on Rt 30; it's right on the highway, so you can't miss it and is worth the trip.
Click on the article title for the link to their website.