After thefempire.org finally kicked the bucket I've been using Postmill on its predecessor, jstpst, and we all really like the software! It's easy to work with and waaaay less bloated than reddit.
I've been making modifications on my own fork of the project and really appreciate how clear a lot of your code is to follow, despite never having never worked with twig or symfony. (The modifications are primarily cosmetic and to handle my deployment process to heroku.)
So yeah, thanks again for Postmill, we really like it and it has enabled our small community to thrive again.