I pinched this article from over at Dvice. This is so much better than those dorky looking Segways. God, I super mega loathe those things. This I'd ride however.
"Witness the UnoCycle, a single-wheel (technically single-axle), single-rider vehicle that appears to be based on gyroscopic tech similar to a Segway and, more importantly, has photographic evidence of its existence. Of guys riding it and everything. You can see them by following the gallery link below.
Still in development, the Uno's top speed is 15 mph, but the inventor, Ben Gulak, suspects it could go as high as 40. That's no Harley, but it's faster than a Segway, and remember this is a battery-powered machine that you never need to fill up. Gulak says he's getting lots of interest lately."