Yea! XM in U.S. rental cars!
I picked up a new Buick LeSabre at the LAX Avis today and it has XM! I spent an hour in bumper-to-bumper traffic on the 405 and didn't care. I was surfing through endless channels. I got up to channel 140 by the time I stopped. Every kind of music genre you can imagine. And news. Even BBC World!
I'll never have to carry around CD's again. I'm hooked on XM!