I just got rumor from a friend south of the boarder. It would seem that the local cops down there found a couple strange black boxes while breaking up a streetrace. The black box was a simple radio reciever tuned to a specific frequency. When it got a signal on that frequency a red LED would flash. The entire unit was mabey one 1" x 2" with an external 9v battery. A cheap (and almost disposable) design.
If those boxes are what we think they are then the cop-racer war is getting technological.
---on another note, think of this:
GPS in car + Internet in car + speedtrap website = one killer early warning system.