Whats the best free forum package to use with Drupal?
I think the right direction is to improve the forum system of Drupal instead of trying to integrate phpBB or creating a forum module that employs a different database. The strength of Drupal is in its taxonomy and modular design; and therefore, the forum module must take advantage of this. I believe that if more attention is placed in improving Drupal forum, then within a short period (may be 4.8), Drupal’s forum empowered by taxonomy and other modules will be A LOT BETTER than phpbb (even though understandably it may not be as efficient because phpBB is a dedicated forum application). Therefore, the efforts to integrate phpBB into Drupal or designing a new forum system are not the best thing for Drupal. Sources: http://drupal.
