I remember seeing YikeBike on here about half a year ago (<a href="http://news.ycombinator.com/item?id=810787" rel="nofollow">http://news.ycombinator.com/item?id=810787</a>) to fairly mixed thoughts, particularly in terms of style (kinda uncool) and safety. Honestly I wouldn't want to drive through any part of Manhattan on it; hitting any sort of pothole or crack in the street would seem to be painful.