I downloaded 2 apps, Trapster and Police Scanner Free before my most recent roadtrip and it was awesome! I have my iPhone bluetooth into my stereo with audio/music/phone. Trapster would mute my music and announce "speed trap ahead" letting me know to stay alert. i don't know how updated or reliable the speed trap data is, but if more people used it, it could be awesome. Police Scanner Free has a cool "near me" feature that finds local scanner stations. It is very helpful when you are trying to avoid accidents and traffic. Does anyone else use software in addition to their RD?