there appear to be modules for drupal to integrate
with mailman mailing lists.
I may try that if people want.

I'm also looking to see if there is a way for members
to send an e-mail to ALL members, so we wouldn't really
need a separate list.

There are also modules where you can mail to drupal
to make posts.

I'm also looking to see if users can get e-mails
whenever somebody posts to a forum.
That would work for mailing lists too...
if everybody asks for mail updates to meetings and viewings forums.