[Zope] Message Board System

I'm looking for message board system for Zope similar to the Ultimate Bulletin Board ("UBB") and all of its clones that are written mostly in Perl and PHP. Is there one out there for Zope? I'm not interested in a simple threaded-message list. The UBB style is the one I want. Is there one out there written in Python that can be used with Zope? Is it possible to easily port or link in a non-Python/non-Zope solution? Thanks for any suggestions. -- Herb Sitz, Seattle, WA