Here are links to several related websites with related information.
Casino Chips & Gaming Tokens Collector's Club
Ed Hertel's Illegal Chip Website
Pete Sanders' New York Chips Website
Rich Hanover's Plain Mold, Litho Inlaid Poker Chips
Robert Eisenstadt's Antique Gambling Chips
The ChipGuy's Antique Poker Chip Page
Travis Lewin's Chip Site
More to come as I get the time to add them... If you'd like to trade links to your website, please contact me and I'll list you here.