[Plugin: PHPBB Single Sign On] phpbb groups –>wordpress roles

They don’t integrate at all. This plugin simply makes phpBB handle the authentication for both WordPress and the forums. Another thing is that when a user registers with WordPress it will create an account in phpBB, but if a user registers in phpBB it will not create an account in WordPress. So we had to disable new user registration in the boards and let WordPress generate the phpBB accounts instead.

This is a really good, simple plugin, but requires a high level of proficiency if you are planning to use on a production site. Also, at least for me, the WP2BB feature does not work in full. I can’t get the options to choose which forum to post to, so it always goes to the default one in the settings.