Core77

I've seen this guy here in Galway, Ireland. I didn't know who he was, but I remember the bike! I might even have some video of him........

*has a rummage*

This design is really nothing new.
in the 1970's a similar 2 wheel steering bike was marketed with modest success... called the "swing bike"

The 70's Swingbike has a regular front steering operated by the rider's hands;
and a rear steering operated by the rider's backside.

http://www.geocities.com/Heartland/Plains/9338/swing.html

The Sideways Bike; the front steering is controlled by the rider's right hand;
and the rear steering is controlled by the rider's left hand.