American Clay Colors and Pottery Bottoms
Antique British Ceramic Information Resource
Antique Pottery and Ceramic Directory
Art Pottery Connections
Art Pottery Discussion Group
Art Pottery Fakes
Art Pottery Links - extensive history of many potteries
Mark Bassett Art Pottery Links
Clayart - discussions by subject
Cleaning Pottery
Collectible Detective
Contemporary Ceramics
Dinnerware - extensive listing of many types
Directory of Matching Services
English Pottery
European Pottery Fakes
Glass and Pottery Sellers Association
Identifying Pottery by its Bottom
Japanese Marks
Just Art Pottery (maybe the first place to look for art pottery info)
Porcelain Repair (Amsterdam)
Pottery History of East Liverpool
Pottery Lovers
Pottery Studio - very extensive list of potteries
Vasefinder - extensive listing of studio ceramics