Texas A&M is using an O2 for their testing of airfoils. Really interesting, as Steve mentioned in another thread this was featured at Oshkosh this year. Isn't it just amazing that these airplanes meet the need for this kind of research. It's the hard points and visibility that shines for their work. Plus they said that the Skymaster is so stable and just a joy to fly.
BTW, they flew up from Texas and stopped to see Don at Commodore Aerospace.
http://flight.tamu.edu/flight/cessna.html