Seems like a very interesting book, gh. Here's my two paise:

Speech is innate. Language as a tool of vocal/oral communication cannot develop without speech and is innate only in this reliance on speech as the stimulus. I would say that the language *instinct is therefore innate whilst language per se is acquired.

There was a lovely exchange on mynahs (dxb started it I think) just after I came here, and another that Jackie initiated on the neurbiology of language; you might want to read in the archives; Search is not working for me (!!??..that interrobang thing was created for me, don't know where to find it); I'd have posted the link otherwise.