In France there's noFOP and we've got some protected buildings that are still under copyright (as far as I know we don't know the exact number), we have started to use a special picture for them in the lists on wikipedia :
http://commons.wikimedia.org/wiki/File:B%C3%A2timent_droit_d%27auteur.svg saying that the building is copyrighted.
We also communicated about this topic with a blog post during the last competition :
http://blog.wikimedia.fr/wiki-loves-monuments-et-le-droit-dauteur-3649 (in french, sorry). Our main problem was that the records describing buildings aren't always accurate and/or the architects aren't famous so for many 20th century buildings we don't really know if they are free or not.
Sylvain