[Zope] Mailboxer vs. Mailman?

Hi, I need to integrate listserv functionality into a Zope site I am developing. I am considering using either mailman (http://www.gnu.org/software/mailman/mailman.html) or mailboxer (http://www.zope.org/Members/mjablonski/MailBoxer). It seems to me that mailboxer has the obvious advantage of directly integrating with Zope for the purpose of customization, and it appears to be at a mature and stable release level. Have folks had good experiences with mailboxer? On the other hand, what is it like integrating mailman into a Zope site? Many thanks! Philip Glaser Principal and Software Architect Sustainable Software Solutions, LLC glaserp@sustainsoft.com www.sustainsoft.com 973-951-9522