Re: WP/bb Full Intergration – HELP!
@McKrazie – I just removed the bbPress registration stuff and require my users to register through my WordPress (MU) installation, although I’m actually running its registration through a totally customized process as well.
If you set up your cookies in bbP and WPMU properly, then users should only have to log in once (as long as it’s all on the same domain/subdomain) – see here for how i did it https://bbpress.org/forums/topic/wpmu-integrated-installation#post-14346
HTH