This is a really difficult issue. Even the most diehard cypherpunk cannot doubt the usefulness of a cellular position reporting capability in an emergency situation, when the user *wants* the cops or whoever to know where he is. The big problem is how to keep it from being used (or abused) for "law enforcement" purposes without the consent of the user. The main reason GPS receivers are not being used is simple economics: as small and cheap as they're getting, they're still too big and expensive for a cell phone. It's not just the electronics, but the antenna too. And they don't work too well indoors. So the manufacturers are developing ways to locate the phone using complexity in the base station, where it can be shared. Various time-of-arrival schemes are being proposed. CDMA has an inherent capability because it (like GPS) uses spread spectrum, although there are near-far problems to be solved. I expect the main countermeasure to cellular position tracking will be the use of one-way pagers. Keep your cell phone turned off, and if you get a page when you're someplace you don't want them to know, wait until you leave before you return the page. Perhaps if the "just turn it off" approach is widely promoted, the carriers and vendors will see the threat to their business and press for some safeguards. Otherwise they just won't give a damn. Phil