Yeah, I really want Star Trek audiobooks, and it's a shame that there isn't any. I got my hope up when "Sarek" was released unabridged a few years ago, but that was an old recording that was republished.
Doctor Who is a franchise that does audio right (even if there's only Big Finish at the moment, since Audiogo went under).
I wonder if there would be any interest from Audible to produce Star Trek books? They (Audible Frontier, I think) did do the Dragonlance and Forgotten Realms books inhouse if I remember correctly.