Landzooom.com – Trikke
‘Trikke (pronounced tri-ike) three-wheeled cambering machines are human-powered vehicles that use Trikke Tech’s patented 3CV technology to allow a rider to propel this chainless, pedal-less vehicle forward without ever needing to touch the feet to the ground.’
This is a strange bike/skateboard/scooter type combination, and there are some interesting videos of it in use.