I think this is my new project for 2012.
I saw these in the Grizzly catalog and thought, "piece of cake!" I can do that!
http://www.woodsurfboardsupply.com/sups.html
I had the opportunity to fish Presque Isle bay this summer on lake erie off one of these platforms (in plastic). I was a riot. Basically we pushed these planks around with a bamboo pole and fly cast to carp and bass. I sure would like a wood one. kids had fun with it too.
The construction is a balsa stringer with "frames" at stations to define the rocker. its practically a simplified plank built boat.
Plank it, glass it, and go float it. looks fun.