From Billboard.biz:
A top-selling artist purportedly had his new single yanked from some radio stations’ playlists in retaliation for supporting royalties for musicians…
The group filing the complaint is the musicFIRST Coalition, and it refuses to identify the artist. But there is speculation that it could be U2 frontman Bono.
Or it could be that the lead single from the current CD was trash. Just sayin’
Stumble It!
Pop Music Notes 
SNAP!
Just sayin’.
An article I read pointed out that Will.I.Am is outspoken on this issue too, yet “Boom Boom Pow” receives more airplay than any other single this year. So I’m inclined to agree with the “stunt” assessment.
Well, whether it’s valid or not, they got their attention and publicity.