I've decided to use my favorite CMS (Drupal) on MOC's home page. This will hopefully improve the site's usablity. There are few advantages of this solution:

• You can create an account and be notified about news by email.
• In future, extending the site by adding a wiki, FAQ or other documentation will be easier.
• Updating the site is easier for me.
• phpBB was insecure and hard to maintain.
• It look's nicer, because it's not mine design :)

There are also some drawbacks, posts from old forum have been lost, and the Drupal's forum isn't as good as phpBB from the users point of view IMHO.