It looks like Sony/ATV have caused a bit of a stir since they pulled their music from ASCAP and BMI. Pandora has been forced to pay an increase of 25% this year for the royalties for Sony/ATV songwriters. It also means any internet radio webcaster that does not have a licensing deal in place with Sony/ATV is breaking the law as of Jan 1, 2013. BMI/ASCAP/SESAC royalties are no longer enough. Something to keep in mind. The Sony/ATV catalog is quite large.
http://www.nypost.com/p/news/business/sony_smusic_mojo_vcWkdgOSrdzb7HLktvBePM
http://www.nypost.com/p/news/business/sony_smusic_mojo_vcWkdgOSrdzb7HLktvBePM