Probable cause has now been released and confirms earlier findings.
http://dms.ntsb.gov/aviation/Acciden...2012120000.pdf
So longitudinal instability as a result of aft c of g, over approved mtow, all plausible.
One thing I thought of recently - the lack of post crash fire given the considerable fuel level onboard. Not knowing the mooney fuel system intimately, I can only assume the pilot managed to turn off the fuel shutoff valve prior to impact ( and had a while it seems to contemplate what was happening given the aft trim, retarded throttles - recovery from a spin)
Very sad accident. No matter what way you look at it, the pilot set out on what was a routine flight he had done a few times before on the exact same route and became unstuck on this particular day in 2010.
RIP Ben!