Greetings all. While the 1.4 update was downloading (Sprint, unactivated post contract), I logged in to the Pre and poked around. The new files I found were in /var/tmp/update. I haven't done anything other than make this list (e.g. look in the ipks) and I confess that I haven't studied anything about the update process.
So, for your voyeuristic reading pleasure, see attached.
--Rob