The web is full of good resources for potters and clay artists, and the variety of content expands daily.  These are a few sites that I enjoy visiting:

For techniques and tips:

http://ceramicartsdaily.org

http://www.claytimes.com

http://www.studiopotter.org

For design and materials inspiration:

http://tkpottery.com

For supplies:

http://www.theceramicshop.com/store

http://ceramicartsdaily.org/bookstore/functional-pottery-2/

New York City Pottery Studios:

http://www.greenwichhouse.org

http://www.92y.org/Uptown/Classes/Adults/Ceramics.aspx

http://www.92y.org