DARPA plans to mate a Humvee with a helicopter...
They wanted a vehicle that has the land versatility of a Humvee and the vertical takeoff/landing of a helicopter. Texas based AVX Aircraft is heading up the design, releasing some design mock-ups of the hybrid vehicle.
DARPA asked for something that could hold four troops, and wouldn't be much louder than a helicopter while flying, or an average car while driving. The four-seater is designed to carry over 1,000 pounds 250 miles on a single tank of gas, and can travel 80 miles per hour while in the air and tops out at 140 on land. Once it's on the ground, it'd take 60 seconds for the vehicle to convert itself from its flying mode to get land-ready.