I guess I shouldn't be so surprised that "Joe's Garage" got airplay on actual FM stations, but I am. Even though I'd been introduced to Frank years earlier (via One Size Fits All, as discussed recently in the Zappa thread), my first Zappa album was actually Sheik Yerbouti, and Joe's Garage, Volume One was basically the follow-up. There were tracks on all of those albums which clearly could never be played on the radio, but "Joe's Garage" is relatively tame. Kinda catchy, too.