bryan - you're obsessed, man. I don't blame you - the musicianship in this show is heavenly, but I doubt you'll get a cast recording anytime soon. In fact, I have to wonder if they'll eventually release a complete live album eventually instead. Or maybe shop a video taped production for cinemas or PBS broadcast.
This is the kind of show that a live recording would make perfect sense (like LADY DAY). Hopefully they'll do something special with a number of the guest stars that they've had, but I'm sure that would be difficult as they're all on different labels.