TeledyN

Nielsen Broadcast Data Systems is the world's leading provider of airplay tracking for the entertainment industry. Employing a patented digital pattern recognition technology, Nielsen BDS captures in excess of 100 million song detections annually on more than 1,600 radio stations, satellite radio and cable music channels in over 140 markets in the U.S. (including Puerto Rico) and 30 Canadian markets.

On a tip from songwriter Paul Stewart (about to leave on his cross-Canada tour and wanting to track the airplay in his wake, Paul called from SoCan HQ with the URL) - Neilsons BDS is simple, and it is free: You send them your CD (or upload MP3s), they fingerprint the waveform and then ping your tally every time that fingerprint appears on any of the 1600 radio stations they monitor.