Because a few of you asked about this app:

If you have an Escort with Live installed your Radar detector can talk via blue tooth to your smartphone. The smartphone gives everyone else with the app a heads up on where Ka/Laser is detected around you.

Here is a link to the technology.
Video

You don't have to have the Escort radar detector to use the app (it does of course make it way better), so if you want to check out the app for free download it here:
App

The app can be used without a the radar detector, but you would need to manage sightings manually for everyone instead of automatically.