One feature I would like us to work on is having Discourse act as a “web archive” for an active mailing list. This simplifies migration off mailing lists and allows us to live side by side with existing software and help many open source projects out there.
For example:
Say we could simply run a simple script to download all the mbox files here: http://www.postgresql.org/list/pgsql-general/ and then import into a Discourse instance.
http://www.postgresql.org/list/pgsql-general/ could simply become a readonly Discourse forum.
Then all we would need to do is add a mode where every post to the mailing list is also added to Discourse.
Even though a lot of the lego is in place to achieve this, it lacks a lot of polish. It would be super awesome for this kind of task to be both well documented and simple to enable.
Imagine if you could just enter a single web address into your Discourse instance (pointing at mailman archives) and it took care of all of the magic for you.