In the US you can buy the professional version of a couple different trackers that take the info that the FAA gives out to the providers for free. You can use this to watch traffic all over the place. There are a couple of filters in place, but for the most part you are able to look at everything.
As many of you know, you can also find a few sites that have the radio traffic on it too. Listening is no problem here in the states, just recording it and giving it to someone else such as a news station. That is a no, no...
regards
Scott