Professional Organizations, and Chess Associations

World Chess Federation (www.fide.com)
United States Chess Federation (www.uschess.org)
Illinois Chess Association (www.ilchess.org)
Association of Chess Professionals (www.chess-players.org)
North American Chess Association (www.nachess.org)

Illinois Chess Links

Scholastic Chess Tournament Listings (www.ilcochess.com)
Bloomington Normal Area Scholastic Chess (www.bnasc.org)

Online Chess Playing Environments

Free Internet Chess Server( www.freechess.org)
Internet Chess Club( www.chessclub.com) 
Yahoo Online Chess(games.yahoo.com/ch)

Special Interest Chess Organizations

GM SUSAN POLGAR (www.susanpolgarfoundation.org)

Online Games Database

www.chessgames.com

Chess Equipment Vendors