hi,
i installed bbPress upon a community.
the theme is a modified kakumai theme,
some plugins used, the forum is avaible in russian and german language using the .po files from bbpress.de and bbpress.ru
i had to write my own plugIn which helps me to sync the users from the community to the forum.
apart of the theme and the disabled bozo.php the forum software is untouched.
here you can see it in action:
http://www.russian-imperial.de/forum/
p.s. bbPress rocks. best forum software ever