http://http://www.nypost.com/seven/02192007/business/heavenly_deal_business_peter_lauria.htm
February 19, 2007 -- Satellite radio operators Sirius and XM are expected to announce their long-awaited merger today, according to a source familiar with the deal.
The two sides were locked in negotiations over the weekend trying to hammer out a final agreement with an eye toward going public with the merger today in Washington, D.C., where XM is based, this source said.
Talks were still going on at press time and the deal could fall apart at any time. With antitrust issues of paramount importance, this source said lawyers for both companies were working overtime to fine-tune the language of the agreement and frame the discussion around the deal itself and not regulatory concerns.
this link below is to the interoperable device site. which is now hidden from public view, the information show is from june of last year http://www.selectsatelliteradio.com/about_us.html the dual devices are done....
from what I gather, this deal has been in the works for the better part of a year now...