If you’ve got a driver’s license, a light-aircraft license, and about $230,000 in spare cash, you can put in an order for a Terrafugia Transition, which is supposed to be available by late 2012 (supply delays have pushed this date back from the planned 2011 roll-out date).

You won’t be able to use it to fly out of traffic (or back in time), but you can drive it to the airport and take off from there. A particularly nice feature is that it runs on plain old unleaded gasoline whether you’re driving it or flying it.