The migration to Drupal is finished! Two projects which have been hosted in private forums are now in Groups: Netplay+ and the former RPG Palace community game.
Any member with the rank of Socialite may create new group. Groups have useful features that work like a private forum that the group creator controls permissions for.
Other new features include user blogs (any member except traveling merchant may keep one) and the now-ubiquitous shoutbox.
If you have an idea for some new functionality you would like, visit drupal.org and see if there's a way for it to be done (Drupal version 6 only). I will consider reasonable requests.