The Uno is a segway/motorcycle mashup. Technically it has two wheels, but they're right next to each other and it does balance on them under its own power.
HyWind, the first floating windmills. It has obvious advantages, such as reduced visual impact and increased power production due to the good wind conditions.
An excellent idea to setting up a wireless lan. With style, no wire, everywhere you want in your house. [Editor's note: fascinating wifi concept(?) using light bulb sockets]