The folk Pottery Museum: http://www.folkpotterymuseum.com/
For several years my parents have been collecting pottery from artists throughout the southeast United States.
The two criteria they use when selecting pottery are that the piece be unique or that the piece be functional, and sometimes both! After cataloging their collection over spring break, I interpret their definition of "unique" to correspond mainly to the glazing treatment as one can see most of their pieces are bowls of various shapes. Their collection also contains a few European pieces they have received as gifts over the years.
Picasa album of collection: https://picasaweb.google.com/BlueLBlanchard/Pottery_032011#
Links to some of the artists from the collection.
Misty Mountain Pottery, Chuck Hanes: http://www.mistymountainpottery.com/index.html
Goat Barn Pottery, TJ Stevens: http://www.missjennyssoap.com/tjpage.html
Smoke in the Mountains Pottery, Kim and Rob Withrow: http://www.handmadeinamerica.org/artists/kim-and-rob-withrow
Hoffman Pottery, David and Sherry Hoffman: http://hoffmanpottery.com/
Magnum Pottery: http://www.mangumpottery.com/