Stepper - 'cause even your granny's got a fixie... WAC

I actually think these are totally ridiculous. I'm tired just looking at them. I'd say it'll never catch on, but you can't underestimate the appeal of complete tat.

Indeed, look at Segway.

I rest my case.

edit; actually having thought about it, it's somewhat better than a segway since you're getting some kind of exercise, somewhat better.