It doesn't exactly exist... It exists in the design/drawing/photoshop/cad phase. They were looking for potential builders, and last time I saw an update on it Bombadier(sp?) was expressing interest.
Its weird how you steer, I can't imagine the thing being all that stable if you took air with it. You have to pivot your hips to steer and kinda muscle the thing around with your legs. I'd love one if I lived in an area with alot of snow.