The civilian version of the Osprey V22 tilt rotor is the TG-609. Such a vertical take off, fixed wing flight platform has long been a UAV dream, but it's proven too tricky for RC modeling to date. Now Gaui seems to have cracked the code. After more than a year of development, mostly on working on the transition from heli mode to fixed wing mode, it appears ready to release the plane. The above video gives a sense of how it will fly; although it doesn't show full fixed wing mode yet, it's at least half-way there.
It's not for sale yet, but apparently Empire RC will be the distributor in the US. I'm not sure this is the ideal UAV platform, due to limited payload capacity and very sensitive CG. But if you want something with the launch flexibility of a heli and the duration and flight effeciency of a plane, maybe this is worth checking out.
Here's a bunch of pictures of the aircraft on the ground and in flight.