Although I'm a bit of a snob when it comes to bicycles -- I don't even look at fixys -- the Bicymple, Josh Bechtel's brainchild, is something I'd like to try. It looks like a hybrid contraption that came from blending a bicycle with a unicycle but that anyone can ride, not just the circus' clown.
By removing the chain, the number of moving parts and overall complexity is significantly reduced. A direct-drive, freewheeling hub joins the crank arm axis with the rear-wheel axis, shortening the wheelbase and minimizing the design.
More than just a stylish concept bike, the bicymple is comfortable, easy to ride, and brilliantly simple to maintain. The lightweight design and short wheelbase make for a nimble ride. The optional rear-steer mode is remniscent of custom "swing bikes" and allows tighter turns and "crab-riding".