Popular Science article, dated: March 7, 2013.
In the article it says...
""He’s not funded at a very high level in terms of what he’s trying to accomplish," [John] Applewhite says."
Also note in the article the brief mention of "quantum vacuum plasma thruster (QVPT)" technology. It "uses quantum fluctuations in empty space as a fuel source, so that a spaceship propelled by a QVPT would not require propellant."