We've got asked a couple of times about how to do authentication and authorization with a database like PostgreSQL or Redis. "Easy, write a plugin!", has been our standard answer.
We've just released a new version of VerneMQ. This release contains many bug fixes and several (smallish) performance improvements.
We presented VerneMQ at the Paris Erlang User Group on June 29th 2015. We don't want to exclude those of you who couldn't make it to Paris on time and share the slides with you. At this point thanks again for having us!