> No thanks. Part of the stability of bicycles is the gyroscopic
> effect of the wheels spinning. This is not stable, it uses control
> to overcome its instability. If it were stable you could ride it with
> no hands on the handlebar.

Actually, it looks like the canard shape of the board would make it stable. If you had enough forward velocity, I'd bet you could ride with your hands off the handlebars (just like a bike). The foil shape of the board creates lift on both sides that would tend to cancel each other, and at the same time, create a righting moment if the boat-bike were leaned.

Just my $0.02 FWIW