XMRadio.com to Become Exclusive Home on the Internet for Unrivaled Commercial- Free Music Plus Oprah, Dylan, Opie & Anthony and More

XM Radio Online Offers 14-Day Free Trial and Lowers Subscription Price More than 50 Percent Through May 30

WASHINGTON, March 7 /PRNewswire/ -- XM Radio Online (http://www.xmradio.com/) will become the exclusive home on the Internet for XM's commercial-free music channels, it was announced today by XM Radio (NASDAQ: XMSR), the nation's leading provider of satellite radio. The commercial-free music channels that XM currently contributes to the AOL Radio lineup will no longer be available on AOL beginning May 1st, continuing AOL's transition to an advertising supported business model. XM Radio Online, available through May 30th for $2.99 per month for the first six months, offers more than 80 channels of commercial free music and XM exclusive programming from Oprah Winfrey, Bob Dylan, Bob Edwards, Opie & Anthony plus a new online-only channel broadcasting the best of XM's Artist Confidential series, featuring one-on-one conversations and live performances with a diverse array of music legends.

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"XM is committed to making our industry-leading content available to consumers in ways that fit their lifestyle, whether it's on the radio, web, through cell phones or podcasts," said Vernon Irvin, EVP and Chief Marketing Officer, XM Satellite Radio. "XM's presence on AOL Radio was a valuable way to introduce consumers to our service free of charge. We will continue to offer consumer free trials of XM Radio Online. We look forward to building our online subscription business and are confident XM Radio Online's new introductory rate along with new channels and features coming this spring will help us turn XM fans into subscribers."

XM also announced the launch of a new promotion for XM Radio Online. New users of XM Radio Online can sign up for a 14-day free trial at XMRadio.com starting today. XM Radio Online will be available through May 30th for an introductory rate of $2.99 for the first six months, a savings of more than 50% versus the standard monthly rate of $7.99. The introductory rate will apply for the first six months of service. To sign up for the 14-day trial and the special introductory rate, consumers can go to http://www.xmradio.com/aolradio. XM Satellite Radio subscribers can listen to XM Radio Online at no charge.

XM Radio's programming is also available to consumers through a growing number of other platforms: a variety of XM music channels are streamed to AT&T and Alltel wireless customers through XM Radio Mobile http://www.xmradio.com/mobile; original XM shows can be downloaded as podcasts from http://www.xmradio.com/podcasts or Apple's iTunes Store http://www.itunes.com/; and XM subscribers can add XM Radio's full channel lineup to select GPS products.

About XM

XM is America's number one satellite radio company with more than 9 million subscribers. Broadcasting live daily from studios in Washington, DC, New York City, Chicago, Nashville, Toronto and Montreal, XM's 2008 lineup includes more than 170 digital channels of choice from coast to coast: commercial-free music, premier sports, news, talk radio, comedy, children's and entertainment programming; and the most advanced traffic and weather information.

XM, the leader in satellite-delivered entertainment and data services for the automobile market through partnerships with General Motors, Honda, Hyundai, Nissan, Porsche, Ferrari, Subaru, Suzuki and Toyota is available in 140 different vehicle models for 2008. XM's industry-leading products are available at consumer electronics retailers nationwide. XM programming is also available through XM Radio Online, the exclusive home on the Internet for XM's commercial-free music channels; as downloads of original XM shows via podcasts from XM's Web site or the Apple's iTunes Store; and as streams of commercial- free XM music channels to AT&T and Alltel wireless customers through XM Radio Mobile. For more information about XM hardware, programming and partnerships, please visit http://www.xmradio.com/.

Factors that could cause actual results to differ materially from those in the forward-looking statements in this press release include demand for XM Satellite Radio's service, the Company's dependence on technology and third party vendors, its potential need for additional financing, as well as other risks described in XM Satellite Radio Holdings Inc.'s Form 10-K filed with the Securities and Exchange Commission on 3-1-07. Copies of the filing are available upon request from XM Radio's Investor Relations Department. Programming schedules subject to change.

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CONTACT: Chance Patterson, +1-202-380-4318,
chance.patterson@xmradio.com, or Nathaniel Brown, +1-212-708-6170,
nathaniel.brown@xmradio.com, both of XM

Web site: http://www.xmradio.com/