A number of GPS companies such as Garmin, Tom-Tom and Magellan have added traffic camera spotters to their devices through software, and the fact that these models are selling so well, even though they cost more, tells you something. That's with a cost for the device and, in some cases, ongoing monthly subscription charges. Of course keeping track of thousands of traffic cameras isn't easy (one GPS model touts over 10,000 in its database) so we can see where a charge could come in - but really? Monthly charges? Even if they're adding speed trap information, that's seems unfair. Bet that the App Store doesn't go that route.