Oh the humanity -hydrogen beach cats -
http://www.vidicom-tv.com/tohiburg.htm

Some have already tryed filling air bags in the hulls , but the volume for helium is small ,and hydrogen a little too dangerous .

Seems we will all be powered by vacume zero space and {wiggle } in the future --makes you wonder about the billion currently designated to help develop hydrogen cars and vehicles to replace gas .
Land sailing yachts would be great for all , but a little tough in the morning commute to work with the wind on the nose tacking within a 66 ft wide highway easement ,--
STARBOARD - #@%%$# :grin

thank god for the creative dreamers ,-the world would be a very boring , diminished and conformist -limited place without em -
http://www.windjet.co.uk/water/competitors.php