-- Last Updated: Oct-12-12 1:20 PM EST --
http://www.uscanoe.com/Adaptive_Paddling_W56C52.cfm
I took one of the adaptive paddling workshops. Over four days we got instruction in paddling and adaptations, met our prospective paddlers, built adaptations for them, did a pool safety check, and went for a protected-water paddle. It was a great experience.
Also:
http://www.nehsa.org/programs/programs.cfm?id=kayak