Re: Pulling users from BBpress into WordPress
I call this “reverse integration”.
Unless there is something I am overlooking, I believe the easiest way to do this is to use phpmyadmin to either rename or export bb_users and bb_usermeta to wp_users and wp_usermeta.
(you’d have to get rid of the existing wp_users wp_usermeta first of course)
Then you will need my fix-admin-access plugin to restore access to the WP admin panel since your role will no longer exist. This assumes you as the keymaster are user #1.