I posted this on www.paddling.net as well..
Wood Strip Built Kits for SUP:
(If you know of others, please send my way, thanks!)
Fiberglass Supply has a few, one designed by Tim NIemier the founder of Ocean Kayaks..
Chesapeake Light Craft,
This one is sweet, a guy uses it in the 13m Round the Rock race annually in Seatle, http://www.clcboats.com/shop/boats/surf_boats/paddleboards/kaholo-stand-up-paddleboard.html
Wood Surfboard Supply:
Paul Jenson's Hollow Surfboards,
2 YouTube build yourself'ers..
Kinda traditional with rigid insulation foam and glass, my homemade 15':