I must apologize in advance, since I haven't been paying that close attention to recent developments here, and this may already be included.
I'd like it to be easy to set up mailman to run with greatly reduced functionality (to run a single announcement (not discussion) list for a site), which shouldn't take any modification, except that I'd like to be able to turn off the password requirements for it--I want people to be able to subscribe/unsubscribe just by sticking their email address in a field and hitting a button. Other fanciness (digest/ack/etc.) should also be hidden, as this is really meant to be a bare-bones way to use mailman. I've hacked earlier mailman installs to remove some of the security, but not in a clean enough way to submit as a patch.
-Dale