Here are some links to the tile industry and others you might want to check out.

Tile association
http://www.tile-assn.com

National Tile Contractors Association
http://www.tileletter.com
Tile Letter magazine

DoItYourself.com - The Leading Home Improvement and Remodeling Website Featuring the Internet's Largest Hardware Superstore

LATICRETE International, Inc.
http://www.laticrete.com

NJ Bathtub Refinishing, Reglazing & Repairs
http://www.americanbathresurfacing.com/bathtub-refinishing-nj.htm