Mathery is a website that encourages people to think creatively, such as building a unicycle with training wheels. Here's the philosophical statement for the site:
An idea is a parasite. Once born, it settles.
If you have one you can make it come true
otherwise it will only leave an imprint.
As soon as we make it real we create a chain reaction.
One idea can generate another 100.
It represents the beginning.
The idea starts now,
It's up to you to give it a shape.
http://www.02mathery.com/project/monotricycle.html via DudeCraft
In other news: Paul Overton, the Dude behind DudeCraft and a friend of Neatorama, has launched a new website called Every Day is Awesome.
For more outlandish unicycle training methods, see also http://www.google.com/patents/about?id=ahsCAAAAEBAJ&dq=unicycle and http://www.google.com/patents/about?id=Hdc5AAAAEBAJ&dq=unicycle.
Also, I haven't checked your inventor's website, since I'm at work (guess what my job is?) but I suspect it may not work that well, since you need to lean forward a little to go forward. Of course, the wheels aren't exactly on the ground, allowing a little lean, so I'd have to see it in action to know.