Robotic Sailboats

Although I'm a dedicated land lubber, the technology in this robotic sailboat is interesting because the control system runs Linux. I assume (being a land lubber ^^) that controlling a sailboat isn't quite as easy as a powered boat, so it's impressive in that regard as well. A little bit of Googling turns up a few other examples (IBoat, Pinta, SPIN) and there is even organized competition.