It’s official. We’re about to experience the greatest merger in the history of satellite radio. The Howard Stern-backed Sirius is officially partnering up with Oprah & Friends-loving XM Satellite Radio. Welcome the new monopoly.

A press conference will likely be held tomorrow, wherein we will find out that Sirius head Mel Karmazin will take on the role of CEO, whereas XM head Gary Parsons will become the chairman of the new, yet-unnamed company. For the time being, they’ll continue to operate independently, but after the merger is complete, you’ll be getting your satellite radio goodness from SiriusX.. XiriusM.. or something.