I found the webpage on the (not yet ready?) geolocalization service for freedesktop.org.
freedesktop.org is "open source / open discussion software projects working on interoperability and shared technology for X Window System desktops. The most famous X desktops are GNOME and KDE, but developers working on any Linux/UNIX GUI technology are welcome to participate."
Their geolocalization service is called GeoClue and here is its description: "Geoclue is a modular geoinformation service. The goal of the Geoclue project is to make creating location-aware applications as simple as possible.
Geoclue is Free Software, licensed under GNU LGPL. It is developed for Linux, but should be portable to any platform that uses D-Bus."
At the end of the description page linked just above the cite various "Possible data sources". There is not even a word about OSM.
I think that someone should contact them.
Any idea on the right person(s)?