Scientific trying to measure surfboard performance, check it out: http://www.engadget.com/2010/08/24/researchers-use-sensors-to-find-the-perfect-surfboard-gidget-st/
Darpa Saw a thread on that link location for DARPA & motion sensors. Uh oh. Killer surfboards are next. Or, surfboards with miniature propulsion devices in the bottom: never miss a wave again, and never have to paddle out through the sets...