Ken-ichi Horie, a 69 year old Japanese sailor, is planning a solo 4,350 mile trip from Hawaii to Japan using the most advanced wave powered boat on the planet. If successful, the trip would earn him a Guinness record while simultaneously proving the viability of wave powered propulsion. His boat, the Suntory Mermaid II, turns wave energy into thrust using two fins mounted beneath the bow. These fins move up and down with the waves and use them to generate "kicks" that propel the boat forward.
The problem is that all of that new fangled technology will only manage to scrape together a top speed of 5 knots. Therefore, it will take about three months to achieve what a diesel powered boat can achieve in only one. Plus, all of the radios and electrical equipment are solar powered. Sounds pretty dangerous, but this is the same dude that made a solo trip across the Pacific in 1999 on a catamaran made from recycled beer barrels. In other words, he's a rugged dude. [Popsci]