It looks like Piaggio came out two concept scooters at the Bologna Motor Show last December with two front wheels. The wheels tilt in a turn just like on a normal scooter. The idea is greater safety for novice riders even when conditions turn very bad. The two concepts were powered by 250cc and 400cc single cylinder engines.
There have been a number of tilting wheeled vehicles in the last year or so, however it remains to be seen if anything like this makes it to market.
via Cycle World