Maybe interesting as well: Dave Richards is aggregated on planet.gnome.org with his work blog [1] about running the infrastructure of the city of Largo, Florida [2] (granted, far from the size of Munich). Time frame seems similar (since 2006) and his blog contains quite a bit of technical information about the challenges of running a city wide thin client network and the custom software they create for their users.

Its a fun read to learn about how many instances of Firefox you can run on a single machine at any given time as well..

1: http://davelargo.blogspot.com/

2: https://en.wikipedia.org/wiki/Largo,_Florida