One More

Apparently I missed mentioning the Milner Aircar, which looks like more of a garage-type development effort. However, their development is further along and they have a couple features which makes them more attractive than the Terrafugia. Chief of those is that the rear wing placement allows greater visibility in car mode, but also the styling of the car is more attractive, and they're targetting a four-seat vehicle, which is more in line with the car form factor.