Links
The North American SCRABBLE Player Association is is a community of tournament, club and avid home players of the SCRABBLE® Brand Crossword Game. We foster an atmosphere for people of all skill levels to play their favorite game, improve their abilities and above all, meet people who share a similar love of the game.
http://www.scrabbleplayers.org/w/Welcome_to_NASPAWiki
Cross tables has detailed information on sanctioned Scrabble tournaments.
Zyzzyva is a word study program written by Michael W. Thelen. It also includes the word judge program that is used in most Scrabble tournaments.