The International Skiing History Association and the US Ski and Snowboard Hall of Fame merged a few years back. If your into ski history this is a great organization that provides tons of free information on our sport and the pioneers that made snowsports what they are today.
The US Ski and Snowboard Hall of Fame web site can be viewed here:
US Ski and Snowboard Hall of Fame
The ISHA is here:
International Skiing History Association
A $50.00 annual dues will get membership into the organization. With that comes a subscription to a beautiful quarterly magazine, Skiing Heritage. Back copies can be read for free on their web site through Google Books. You will also get an invite to their annual Skiing Heritage Week. If you're a ski history buff and you haven't checked out this resource, I'm sure you'll like it.