Check out this sweet motorized skateboard.  Developed by an Australian based company, the Wheelman can cruise around at up to 19mph and is powered by a two-stroke engine and can hold up to 1.5 litres of fuel.  It can even go off-roading however you probably want to wear some pads if you decide to go down mountains with it.  Check it out over at the Wheelman website, via OhGizmo