Saw that yesterday too. There are some videos of them on YouTube...pretty cool. They transition from water to land and back again quite easily.
I'll wait for the four person model though...this one is a cross between a quad and a waverunner, I want the cross between a ORV and a jet boat.
"What is best in life? To crush your enemies, see them driven before you, and to hear the lamentation of their women."