links you might find useful...

New Mexico Clay - Great source for clay supplies; very knowledgable & friendly: http://www.nmclay.com

Santa Fe Clay - Another supplies source and gallery: http://www.santafeclay.com  

New Mexico Potters and Clay Artists Association (NMPCA): http://claystudiotour.com

Georgie’s Ceramic & Clay in Portland, Oregon - One of my very favorite stores; very helpful and knowledgable staff and they make some incredible glazes: http://www.georgies.com

Coyote Clay & Color - They make some fine glazes right here in New Mexico: http://www.coyoteclay.com