John Gage of Sun Microsystems is talking to us in Tallin, Estonia about Technologies Development. One of the points is about how we’re being spotted with all the radio equipment we have.
However, that brought me to the idea that the new DECT phones allow to connect one base stations to another one, and thus you could actually use a normal 2.4 or 5.8 GHz phone to talk from one location but noone will be ever able to locate you. Of course, it gives only like few hundred meters, but imagine installing 5 base stations, and you may be 1 km away from where the police would think you are. Or the bad guys.
Have to think more about it.