Linux
The Client runs now as smooth as on Windows, thanks to Urho3D, which seems to compile and run almost everywhere.
Open Source
While the source was on GitHub for some time now, it was not really possible to run your own server, because assets, documentation and some more things were missing. Now everything is available and there is detailed documentation how to build and run the server and the client. There is even an automatic database migration tool, which can be used to create the database structure, and later on, to update it.