These boats definitely look cool, and they can fly (whether literally or not, only time will tell). ETNZ hits 35-40 knots in this video, and that's enough to have hometown sailing commentators Martin Tasker and Peter Lester practically wetting their pants with excitement.
I'll leave it to the foil-ologists to argue about what this video tells us about whether and how this AC 72 will get up into the air. The most interesting part to me was that they almost stuffed it (comes at the end) in a very flat sea state. A pitchpole in one of these babies would be very, very expensive (and dangerous).
So I guess the question is: how easy is it to do? And what happens in any sort of wave action?