Google Mobile Maps PinPoints Your Location Without GPS

Google has been adding features to its maps at a fast and furious pace. Yesterday, it was terrain and wiki-style collaboration for its Web-based maps. Today, it updated its mobile maps to pinpoint your locations by triangulating between cell towers (or if you have GPS on your phone, it uses that, but only 15 percent of phones sold this year even support GPS).
http://www.techcrunch.com/2007/11/28/google-mobile-maps-pinpoints-your-location-without-gps/