Read more and see photos via the source link. Source: http://www.kickstarter.com/projects/4422853/onewheel-the-self-balancing-electric-skateboard
I think it is cooler than a Segway. I like the tire they used, it looks really sporty and I bet stones won't stop the board dead and make you go flying.
They've already blown past their funding goal by more than double as I write this with eleven days more to go. They are planning a August 2014 delivery of the first backer units. My personal experience with Kickstarter project backing is they always took a little longer because in most cases they receive input during the backing phase from the backers that adds functionality to the project that need to be implemented. The projects I've backed were all worth the wait and I'm sure this one will be also.