I’ve used Discourse for a few different orgs, I think it works well.
General tips:
- Make sure everyone uses it, and knows how to do all the things expected of them. Encouraging questions in a specific support category is useful.
- Explain to folks how to use the email interface, it can be helpful to folks coming from listserv.
- Figure out how much space you’ll need to store files, and double it.
- Make sure you understand the privacy settings, but also the users; you don’t want them to be surprised by a reveal.