[Dovecot] Dovecot and Pipermail integration

Hello,

I have a standard Mailman/Pipermail install with mboxes at

MM_HOME/archives/public/listname.mbox/listname.box

What's the best way to export these via IMAP using Dovecot 1.0rc15 on Debian etch?

I know I could make a namespace with MM_HOME/archives/public/ but that would result in half of the directories being exported (the ones containing the HTML archives) being unusable. I could also create another directory and symlink all the mboxes in there but that seems wrong. Preferably, I'd like to have something like a namespace with a mail location of MM_HOME/archives/public/*.mbox/ but that doesn't work with v1.0

Ricardo