Still the same $70k. :/ But over in one of the Innovations Hangars, there is Engineered Propulsion Systems with their prototype EPS Vision 350. It's the same basic idea of a turbo-diesel. They're starting out with an 8-banger 350hp engine burning just under 20gph at WOT. When I asked, they also supposedly will develop 6 & 4-bangers down the road (with the typical caveat of finding a market and investors). I asked about their timelines, cautioning about not repeating Delta Hawk's mistakes of taking forever. They seem to want to get production going within the next year. Quite a bit overpowered, and they're targeting the bigger Cessnas and Cirruses to start out, but might be a new one to watch and see what develops.
http://www.eps.aero