Does anybody need the possibility to start reading an ebook (from Guttenberg) from the place where he finished an audiobook and vice versa?
It appears, it's not hard to mass-synchronize books with audio and write up some app to conveniently consume this mixture. Similarly to Amazon's whispersync for voice, however not sure if they do it in an automated way.
Perhaps, it's possible not only for English, but for any language Sphinx supports.