Washington State Sports Collectors Association - Sponsors an annual show in Seattle. Includes club meeting times, show information and dates, dealer profiles, and membership information.
TennisCans.com - Vintage tennis ball can and container database. Includes message board, photos, manufacturers, guide to cleaning cans, age, history, and type.
The Olympic Collectors Commission - Features stamps, coins and memorabilia items in a virtual gallery, including items from 1896 Athens and forward to Sydney 2000. Also offers event list and related links.