As you've said, they've been at this for years, so it is not happening fast. 2018 is two years away, but they didn't come up with this idea today. The PAFI initiative is in full speed ahead mode now. It is surprising more people aren't aware of this in the experimental aircraft section, where people have a way above average interest in just this sort of thing. Anyway, I'm sure the fuel prices will go up exponentially, and from what I'm told, one of the fuels up for EPA cert has a nasty side effect of being "unfriendly" to painted surfaces.
