hi.... there is a new implementation for multiple forums. Who is interested can to take it from svn to this link:
http://anonsvn.jboss.org/repos/labs/labs/jbossforums/branches/multipleforums110P26
You can to add a new forum directly by web adding a preference from portlet instances form of portal. The new forum is represented by a foruminstanceid preference. It is a number that identify a forum. If two instances of forum has the same foruminstanceid , then they are equals, while if those preferences are different , then the forums are different and they will get different categories, forums, topics ...etc etc.
