Nope. XM and Sirius are trying to get a merger approved by Federal regulators. They're not going anywhere near Imus.
From a purely business standpoint, why would they want to make any major contractual moves until they know whether the merger is going to be approved? It would be stupid to be bidding against eachother.
The future of satellite radio is not really clear to me. Many of the programs strike me as the broadcasting equivalent of a "MySpace" website. Who's really listening?