Google's social networking effort Buzz shut its doors last year but has popped up yet again, for what may be the last time. In an email that just went out to former users, Google noted it's packaging Buzz data into two files which will be stored on their Drive accounts. One is private, which will hold all of their posts both public and private, and another is public, which will contain a copy of any of their public Buzz posts, accessible to anyone who has a direct link (old Buzz links will redirect