Mt. Airy, Md. -- In the past 20 years, several winegrowing regions have become known worldwide for growing and making some of the best wines of a given type. New Zealand and Sauvignon Blanc is one example; Oregon and Pinot Noir, New York and Riesling are two regions in this country that have emerged with distinctive regional wines. So far this has not happened for the Mid-Atlantic area, despite the fact that more acres of grapes are being planted and more wineries open every year.