An intriguing keyboard concept. They have a web-based tutorial where you can try it out on your iPad, and I really recommend that you do try it out. I have spent a few months of my life trying to shift from QWERTY to DVORAK before, and always failed to do so.
I spent 10 minutes playing with this on my iPad and was starting to feel pretty confident. I can really see this gaining some traction, it’s simple, easy, and fast. Seems like it would be ten times easier to teach children.