The nightly builds for Kolab have been running nicely for a while, and they are now compiled on the Kolab Systems OBS server.
Now I have added Debian packages too.
This might help other people interested in packages for Debian as an example, how to branch packages on OBS.
I have extended the documentation, and you can see a preview here:
This includes documentation how to create a nightly build for CentOS or Debian, and how to install from a nightly build, for both distributions.
Unfortunately, there is still some work left to make the Debian Kolab 3.1 packages more stable. But one problem (setup-kolab not running) has been solved in this nightly build already.