This apparently was displayed at the Tokyo Motor Show in 2007, however I didn't find out about it tonight until I saw it on an episode of "Top Gear".
It's a personal mobility device, with a range of up to 30kms per charge (I could get to work, but dropping the girls off at school on the way could be a challenge!).
I like the idea. Especially for short trips around the city.
Check out here for more details.
What do you think?