A new city district is built where I live, and the district is so fancy it even has its own advertisement home page telling me how awesome it is. Said page also has a map to show the progress, which uses OSM as background tiles. That map was missing the OSM-©-notice, so I mailed them about it, but didn’t expect much.
To my surprise I got an answers a few days later. It appears I reached the management deparment though. At least I had the feeling they didn’t really know what an OSM mapper is, because they didn’t quite grasp why I asked if they have any sat photos for me…). Anyway, they stated they had technical problems putting the notice in and had therefore included it on the legalese page -- I honestly missed that. I didn’t want to scare them off OSM with being to picky, so I told them that that’s okay then.
By accident I stumbled across that page again today, and they have added the note. Yay! It reads: “Leaflet | Map data © 2011 OpenStreetMap contributors, Imagery © 2012 CloudMade” Well. It’s 2013… and they use MapBox’ tiles. Close enough :-)