Seguem um pequeno resumo (em inglês) sobre a location API retirada do Google Mobile Blog:
"Wireless phones can make and receive calls because they are connected over the air to a nearby cell tower. The phone knows the ID of the cell tower that it's currently using. If the phone has GPS, the Maps application on the phone sends the GPS coordinates along with the cell ID to the Google location server. Over millions of such updates, across multiple phones, carriers, and times, the server clusters the GPS updates corresponding to a particular cell ID to find their rough center. So when a phone without GPS needs its own location, the application on the phone queries the Google location server with the cell tower ID to translate that into a geographic location, i.e., lat/long coordinates. Nifty, huh? We think so. "

Acho que muitos aplicativos baseados em localização legais sairão do forno agora com a disponibilidade dessa API!
A notícia completa se encontra aqui.
=D
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