Have successfully integrated bbpress 2.0.3 into twentytwelve responsive theme that was updated with WP 3.4. (Had to start again, as WP 3.4 broke another theme.) I am using it with WPMU Membership plugin and that works too. The membership is private, access to the forums shows up in the menu when a user has logged in, members are added manually.
The one thing I have not been able to do is to format (CSS) the bbpress user profile/account page. And if I enter a full path to a user account into a new browser that has no users logged in their information shows up and can be edited!!! (example: http://mysite.ca/forums/neighbours/test-user/)
This is a cross post with WPMUDEV, as their membership plugin is involved, but I am asking if there is something I can do with bbpress files to make the profile pages more secure and properly styled. Can I somehow forward the user profile to a page I can format better? Please advise. The security issue troubles me most.