XM Satellite Radio's MLB Home Plate to Air on XM Radio Online

Starting March 29, MLB Home Plate Channel Will be Available on the Internet for the First Time

Baseball Fans Can Log on to XM Radio Online for Baseball News, Call-In Shows, Commentary, and Specials on MLB Home Plate 24/7

WASHINGTON, March 26 /PRNewswire-FirstCall/ -- XM Satellite Radio today announced that its 24-hour baseball talk radio channel MLB Home Plate will be available online for the first time, starting March 29 at XM Radio Online (http://listen.xmradio.com), the exclusive home on the Internet for XM's premium content.

MLB Home Plate (XM Channel 175) offers round-the-clock baseball news, commentary, call-in shows, and in-depth interviews with the greats of the game. XM's all-star team of on-air talent on the MLB Home Plate channel includes Hall of Famer Cal Ripken, Jr. and fellow major-league veterans Buck Martinez, Rob Dibble, Kevin Kennedy, and Bill Ripken. XM launched the channel on the satellite radio service in 2005.

The MLB Home Plate channel is the latest addition to XM Radio Online, which offers web users more than 80 channels of commercial-free music and XM exclusive programming from Oprah Winfrey, Bob Dylan, Bob Edwards, and Opie and Anthony.

New users of XM Radio Online can sign up for a 14-day free trial at www.xmradio.com/mlb. XM Radio Online is offering an introductory rate of $2.99 a month, a savings of more than 50 percent compared to the standard monthly rate of $7.99. The introductory rate will apply for the first six months of service. Customers can sign up for this introductory rate through May 30.

If you are already an XM Satellite Radio subscriber, you 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/. 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 2-28-08. Copies of the filing are available upon request from XM Radio's Investor Relations Department.
Programming is subject to change.

Contact: David Butler, XM Satellite Radio, 202-380-4317, david.butler@xmradio.com