COPYRIGHT
Record labels and radio
ARTICLE LINK
By Steve Gordon at the Register

Whilst sound Exchange collects for the digital use of sound recordings (maters owned usually by labels) a quirk in US law means there is no equivalent to PPL (Phonographic Performance Limited) collecting for the public performance of tracks. Is this going to change?

See http://www.theregister.co.uk/2007/09/20/steve_gordon_riaa_radio/