Glad to happen upon this thread. http://discourse.kabissa.org is the forum for Kabissa - Space for Change in Africa, a nonprofit, volunteer-run networking platform that connects organizations working in Africa for peer learning and information sharing.
Do join us! It would be beyond wonderful to get advice and help from fellow discourse admins - come and join the discussions and let me know if you're interested in pitching in as a volunteer developer or in other roles to help us set things up optimally. I can do a certain amount of updates and hacking around the edges but know I will bump up against my limits soon.
Our interest in discourse is in adding it to our mix of communications tools - we also have a blog, newsletter, searchable directory and run webinars - all powered by a somewhat outdated setup with drupal and civicrm. The hope is to empower as many people as possible who are working at the grassroots in whatever way works best for them. Email is still the killer app so we love the mail in features, notification system and digests to help people stay connected and contributing. Discourse has been awesome as a comment engine replacement for our blog, which is very much proving to be a gateway into the forum for active Kabissa members seeking to use our platform to spread their ideas or raise awareness about their activities and needs. We've also been experimenting with it as a live blogging setup for gathering knowledge and ideas for our webinars which has been fruitful.
It's been fun contributing to the discussions here on meta about features and I really appreciate the welcoming community here. Priority areas for me are UX, membership management and mailman replacement features. I am actively testing and documenting experiences in the kabissa meta category, and welcome help getting to the bottom of some of these issues so we have good feedback to give to discourse developers.