Sal Smario sent me these photos from Punta Mita, Nayarit, Mexico. This is a three seat stretched Ulua rigged for fun in the surf. Notice the larger floatier ama with a flat bottom and plenty of rocker up forward, developed in Hawaii just for surfing. For speed under sail a wave piercing ama shape is the way to go, unless you plan to sail down very steep waves a lot.
Sal plans to build two more Uluas.