During post production of In the Wake of Genocide I was pointed in the direction of two fantastic resources for radio producers and to some extent for current affairs journalists too.
The first is the Free Sound Project which is an online community of soundFX collectors and sharers. Most of the content is quite good quality, is easy to search for especially with the user ratings, and .wav files or mp3s are available for download and use. All files will let you know what the copyright conditions are through creative commons.
The second is another creative commons community (like flikr and others) but this one is a community of music mixers. ccMixter is geared dj types who share samples, remix them and then upload them for the cycle to happen again. But that didn’t stop me from finding a huge range of tracks which perfectly suited my radio feature. There are loads of genres from french jazz to electronic to ambient and some very talented artists. Again all tracks will alert you to the copyright conditions which are generally not too much more complicated than attribution. All files are mp3.
I’ve added permalinks to my links category which you can always find at the bottom of the page.