Cool. This sounds pretty much like the inverse of what I proposed in this thread (You: take a unicycle wheel design and lay it down to make a bike, Me: take a bike design and stand it up to make a unicycle). Let me know if you need someone to stress test it by riding the wheel like a unicycle (with full body weight on it) or to demonstrate a wheelie. I would definitely be in the market for such a hub as long as it freewheels.