Patchin Curtis and I visited Londontowne Tropicals today. It's a new freshwater fish store a little ways south of Annapolis.
We were both pleasantly impressed. The store has a lot of tanks and a wide variety of fish, shrimp, and snails, at reasonable prices. I picked up a bag of Beckford's pencil fish and some assassin snails. The staff member we spoke to seemed quite knowledgeable and keeps fish herself. We also spoke with the owner, Dale, who was very nice and interested in supporting PVAS.
In addition to livestock, the store has a nice selection of fish food and a limited amount of aquarium equipment and tanks.