Indeed, it would be nice. Something like that shouldn't be too difficult to do. People all around the world would send their ASD-B data to a centralized server

Indeed, it would be nice. Something like that shouldn't be too difficult to do. People all around the world would send their ASD-B data to a centralized server which would process it all and make it available via a nice, stable API. Something like http://www.openstreetmap.org/ http://www.openstreetmap.org/.