Today I sent an email to XM asking what they planned on adding in place of CNN/SI after it goes off the air in May, I also asked if they considered adding an Old Time Radio Channel.
I got a reply back and it contained no mention of the first question, however look at this reply about the Old Time Radio Channel
Most definitely. We're working on it.
Thanks for your support of XM.
Out of respect for the XM contact I have removed his name, but he is a higher up at XM.
Please do NOT consider this an official channel anouncement from XM, but its really close.