We've now completed integration of a forum system into XLsuite. We started with beast but blew over their 500 LOC limit in customizing it and integrating it into our client manager.

This project is not managed on RubyForge:
The source code is located at http://xlsuite.org
and our development forums can be located at http://xlsuite.com/forums

Please drop by and give us a visit if you're looking for a ruby on rails based CRM