Peter Norvig is "... now taking a short leave of absence from Google to update his AI textbook." This is news to me, and potentially quite exciting (even if I

Peter Norvig is "... now taking a short leave of absence from Google to update his AI textbook." This is news to me, and potentially quite exciting (even if I have just finally acquired my own copy). Does anyone know anything else about this; what sort of new material, etc?