How to create a forum

[eluser]davidbehler[/eluser]
A forum is nothing one can explain in 5 words...it's kinda complex

You need several tables (user, forum, topic, post to only name a few), user right management to allow for editing of posts/topics by admins or moderators or the creator of the post/thread, maybe use of bbcode/smilies and quite alot of more or less complex database queries and layouts.

I'm not aware of any publicly available forum based on CI.
I created one for private use and I am working on a new version for public release but that'll propably take some more days, if not weeks.