I think I've tried almost everything:
bbpress seems abandoned.
mingle isn't that easy.
simple:press's plugins are no longer free.
I'm not interested in building a community, so buddypress and symposium are not quite what I'm after.
All I'm looking for is something simple, that uses the wordpress users and integrates well with the twentyeleven theme.
The only way I've found is to install a phpbb forum and use this for syncing the users.
Is there an easier way?