The proposed merger of the only two satellite subscription radio companies — XM and Sirius Radio — should raise a red flag for both antitrust officials and communications regulators whose job is to promote competition and consumer choice in the marketplace. Not only were XM and Sirius prohibited from merging as a condition of getting their licenses to use the public airwaves to deliver their services, the enormous growth of satellite subscription radio service at very substantial monthly charges and consumer equipment costs over just a few years demonstrates that this service is, in fact, a distinct product and could develop into a vibrant competitive market.