Am I missing something, or where is the http://www.trueposition.com tech included in this link? At least for the gsm networks, they can generally locate you with cross tower triangulation within 60 meters or so, far more accurate than just the nearest tower. Useful for e911 without GPS working. I'm not sure if they have any non gsm customers.
Before GPS hardware was commonly available in phones, some CDMA carriers offered phone-based navigation services that relied on tower triangulation. Thus, it's highly likely that triangulated location data was available to emergency services and law enforcement from CDMA networks as well.
