Awesome! Next time I'm looking to set up some user management stuff, I'll have to try it out. I especially appreciate the sample configurations you give for each service you are trying to integrate with.

Thank you for LLDAP, I'm using it as we speak for my self-hosted stuff.

Can something like this be used to host phone books for IP PBX?

Not quite yet, but I'm working on a feature that will enable that: https://github.com/nitnelave/lldap/issues/67