Washington - XM Satellite Radio, a provider of satellite radio service to more than 7.6 million subscribers, is negotiating a deal to sell its XM-4 satellite for as much as $300 million, and then lease it back, Barron's Online reported. Citing information from UBS analyst Lucas Binder, Barron's said the deal would provide extra liquidity for XM, removing the need for it to access its revolving credit line. The company is scheduled to report its fourth quarter and full year earnings next week.

Cedar Knolls, N.J. - MediaBay, a distributor of spoken word audio content, announced on Friday that it has filed to deregister its stock and end its reporting obligations with the Securities and Exchange Commission (SEC). The company said it was eligible to do so under SEC rules because it has fewer than 300 shareholders of record. MediaBay expects the deregistration to become effective in 90 days.

New York - Fox News has introduced a subscription service that delivers an audio feed of the cable news channel to cell phones, according to The Hollywood Reporter. The company partnered with Single Touch Interactive on the service, which will initially be available to Cingular subscribers for $2.99 a month, plus per-minute charges.

Davidson, N.C. - UpSnap, a provider of mobile search and streaming mobile audio services, announced on Wednesday that it has partnered with the Sporting News to launch on-demand mobile audio sports broadcasts. The mobile phone audio service will include shows hosted by NFL quarterback Troy Aikman and sports talk radio announcer Tony Bruno.