Connecting cars build after 1996 with a retrofittable hardware to the internet. The patent pending M2M technology access any data a car produces and delivers it (encrypted) over WiFi to the connected smartphone, to the mad backend and to other cars/infrastructure enabled with the mad technology to implement Vehicle-2-Vehicle and V2X communication
The open API can be used by crowd developers to develop 'car apps' and companies can offer services based on the data the car delivers: car insurance (pay as you drive, usage based, etc.), OEMs can track error codes over time and in conjunction with external factors, automobile clubs can diagnose the car remotely, real time traffic information, etc.
http://www.youtube.com/watch?v=aI_Ag5LLCeY explains it in a nutshell.