Cobra’s iRadar system pairs a Bluetooth-enabled radar detector with a free iPhone app to warn lead footed motorists of nearby radar guns. The iRadar app also includes an automatically updating database of known speed traps, dangerous intersections, and red light cameras.
The radar detector hardware itself is a bit pricey at $170, though it works as a standalone detector with or without the iPhone app and is capable of detecting "all radar and laser guns on the market" with full 360-degree protection. The app can be downloaded and used for free in order to get the non-radar alerts listed above but when paired with the detector, you’ll be able to tweak the hardware settings via the phone and receive radar alerts.
More on Techland: