Sharing edits to GPS maps : "Mapshare "

One of my pet peeves with most of the GPS systems out there is the number of errors that are there in the maps. And to add to that frustration - there is no way to upload or save your changes to POIs (points of interests), let alone share it with other users. Wouldnt it be nice if before you travel to a city you go online and download an updated POI, street database that would have been edited and corrected by users in that city. Well TomTom and SatNav seem to have gone the way of social networking/updating..... You can use their system to correct POIs (not roads yet - atleast I dont think so) and then upload it for use by other users..... nice! The technology is called MapShare! Mapping the World with Tele Atlas