I thought you guys would enjoy this. I found out that the dispatchers for my airline, who are working the ATC coordination desk, have a couple new tools for their use.
JFK now is using a system called ASDE-X (which I think has been described on these forums before). Basically, it is a ground radar system that uses the aircraft's transponder to identify it, just like airborne radar. Our dispactchers have a software tool that allows them to see the layout of JFK and the location of all of the taxiing aircraft (those who have their xpdrs on like they should). It is a great tool to find the location of aircraft that are arriving and/or departing that may be stuck in one of JFK's notoriously incredible lines.
But, to get to the funny thing, this system is just a very accurate diagram of the runways/taxiways/terminals at JFK (its almost the same thing the controllers look at). But, for them to get a better idea of what is going on, you guessed it, they've got the JFK tower LiveATC feed going in the background.
So, its not just the casual listeners who are on the feed. It an airline using it to assit with its daily operation.