Oops, sorry, saw the Trac URL just as I was posting! I put it into there, linking for reference:
https://bbpress.trac.wordpress.org/ticket/2046
There is no separation between WP users and users in Pods. Pods is a plugin built ontop of the WP framework. It creates custom tables which are scuplted to fit the exact specifications of the content developed with Pods.
I’m building a migration script that does migration automatically. As for what bbPress itself evolves into, I’m not sure if it will get easier or more difficult, but I plan on accommodating a reasonable amount of trouble 
Finally done with it, took a little bit because I got very busy with client work. You can check it out at:
http://podscms.org/packages/bbforums/
r-a-y,
Thanks for your interest in the project! It’s definitely heading in that direction 
The way this would be handled is that plugins can hook into other plugins. Actions / Filters still work the same between plugins as they do between core.
