They are expected to merge, their combined talent pool to be available to either customer base (although it may go ala-carte)
http://investor.sirius.com/ReleaseDetail.cfm?ReleaseID=230306
Although I agree with Dennis, I don't expect to be paying for a radio subscription anytime soon. Hi, thanks....yeah, I'd heard about the expected merge, though I wonder how the offerings will go after that.
I can get some of these stations for free when I'm connected online, but what would be great (for me personally) is the portable capability