Five members of SOSM are currently in Karlsruhe, where this years State of the Map EU takes place. It is at the University of Applied Sciences, located in a very nice green area.
On Friday, rendering was a topic, with alternatives to mapnik, alternative style sheet languages, rendering from vector tiles, and also 3D with OpenGL, WebGL and Blender. There were also a few presentations on quality assurance.
On the second day there were a few talks about data maintenance. The state of the license was topic to another talk, with Mapbox presenting the problems they encountered with the current license.