Rush has no plans to go via XM or Sirius, because he's said time and again when the subject has come up on Open Line Friday that he's committed to the terrestrial AM/FM stations that put him where he's at today. He's got more listeners now, than XM or Sirius have subscribers. It'll be tough for Hannity to find a lucrative timeslot on FOX News Talk.
Sean needs to own the show and use a syndicator to manage it. He'll make more money and nobody can tell him what to do.