CLAYART is at the top of my list.
This is the best place to start if you are
interested in making pottery. It is a friendly, professional, online discussion group. Subscribe at www.ACERS.org


Charter Member
Also at ACERs is the Potters Council. Good stuff for full-time potters and discounts for everyone.
www.potterscouncil.org
 

Another good web site is Orton. Lots of information about cones and electric kiln firing.
The Orton Foundation   www.ortonceramic.com