It's probably very tempting, however, as a Sirius subscriber and fan, I can't comprehend commercial radio any longer. Ad free radio is awesome for me and for a lot of subscribers out there. But as an alternative medium it's fine, just don't screw with my ad free Sirius! :D
There's room for both and I'm a big fan of both. A little co-mingling wouldn't hurt for coverage sakes, like when I'm traveling to China or Europe and can't get Sirius, then you have a winner.
Same thing for Sirius Subscribers, Pretty much North America coverage via Satellite, but then start talking streaming and it's worldwide in an instant.
Just my $0.02 worth (or for today's stock price, my $0.0063 worth)