> As for Munich: Isn't the change towards Linux still ongoing?
Yes, it is. And they seem to have accelerated the migration over the last 1-2 years, they migrated the 9000th desktop at the end of last year, out of around 12000 planned overall, see (in german) http://www.it-muenchen-blog.de/2011/12/munchen-hat-den-9-...
Disclaimer: I work for a company doing external support and development for the Limux project.