If you have been to Berlin ((Maybe two years ago at the last Desktop Summit? ;) )) you know Alexanderplatz S+U station.
Since some days ago, huuuuuge ads where put in there. It looks really nice to be surrounded by FOSS ads on the way to work :)
I do really like the “We work for you not for shareholders” ((You see, my Deutsch is getting better!)) :D
on berlin busses as well … nice logo on the back of the bus today – what a surprise :)