XM has more going than just radio, they do weather info in airplanes and probably more in other applications. why couldn't they just add more channels, xm broadcast to their clients, sirius to their clients, just it would be the same programming. I do not think they would double the channels available like from , just for grins 100 to 200 channels, but maybe make it 140 combined and let each satellite broadcast to its own radios. later on make the radios tune into both satellites. I think they could do whatever they want and most people would not even notice the difference. I feel like they could save money in marketing, programing, and customer service by teaming up, and would raise their advertising revenue by adding many listeners.