http://www.usatoday.com/money/media/...us-talks_x.htm
So, its still pending. I'm sure the FCC and DoJ will have something to say about compliance, monopoly protection, etc.
I think the main argument they are going to put forth against being a monopoly is that they are still in competition against terrestrial radio and satellite TV music channels or some other BS.
I hope the combined service doesn't suck, as I think Sirius content beats XM in a big way.