The American Whitewater Affiliation (AWA) is a nonprofit group that supports and researches river access issues. They also sponsor whitewater boating competitions and festivals in various locations throughout the country. AWA is a great organization.
Three Rivers Paddling Club (TRPC) is a Pittsburgh, PA based kayak club. They sponsor trips, training clinics and roll classes. If you want to learn how to kayak you should contact TRPC.
Another picture of me whitewater kayaking. I am in the blue and white boat and YES, I was trying to do that!