SIRIUS is Official Satellite Radio Partner of University of Notre Dame; Fighting Irish football and men's basketball games air nationwide on channel 159 Internet version of SIRIUS service will be the exclusive online radio home of Notre Dame football; Will also offer Fighting Irish men's basketball

NEW YORK, Sept 05, 2008 /PRNewswire-FirstCall via COMTEX News Network/ -- SIRIUS XM Radio
(Nasdaq: SIRI), the Official Satellite Radio Partner of the University of
Notre Dame, announced today that starting this season, SIRIUS will add an
exclusive Internet offering of Notre Dame sports broadcasts to its existing
broadcast package.

(Logo: http://www.newscom.com/cgi-bin/prnh/19991118/NYTH125 )

SIRIUS Internet Radio (SIR) will be the exclusive online home of every
Notre Dame regular season football game and will carry every Fighting Irish
regular season men's basketball game live. It marks the first time that radio
broadcasts of live sporting events are available on the SIRIUS Internet Radio
platform.

SIRIUS Internet Radio is the Internet version of the SIRIUS radio service,
available without the use of a radio to current SIRIUS subscribers, or with
the monthly subscription fee of $12.95. SIRIUS Internet Radio delivers more
than 80 channels of talk, entertainment, sports and 100% commercial free music
in CD-quality sound.

SIRIUS, which has aired Notre Dame sports since 2004, will continue to
broadcast the university's football and basketball games nationwide on the
SIRIUS radio service. All Notre Dame games air on The Catholic Channel,
SIRIUS channel 159.

The Notre Dame football broadcasts are produced by ISP on the Notre Dame
Radio Network.

Notre Dame's football season kicks off Saturday, September 6 (3:30 pm ET)
when the Fighting Irish host the San Diego State Aztecs at storied Notre Dame
Stadium in South Bend, IN.

Notre Dame basketball is in action starting at the Maui Invitational
tournament in Hawaii on Monday, November 24, when they will face Indiana
University in a first round match-up.

Log on to www.sirius.com for more information.

About SIRIUS XM Radio

SIRIUS XM Radio is America's satellite radio company delivering the "The
Best Radio on Radio" to more than 18 million subscribers, including 100%
commercial free music, and premier sports, news, talk, entertainment, traffic
and weather.

SIRIUS XM Radio has exclusive content relationships with an array of
personalities and artists, including Howard Stern, Oprah, Martha Stewart,
Jimmy Buffett, Elvis, Jamie Foxx, Barbara Walters, Frank Sinatra, Opie &
Anthony, The Grateful Dead, Willie Nelson, Bob Dylan, Dale Earnhardt Jr., Tom
Petty, and Bob Edwards. SIRIUS XM Radio is the leader in sports programming as
the Official Satellite Radio Partner of the NFL, Major League Baseball,
NASCAR, NHL, and PGA Tour, and broadcasts major college sports.

SIRIUS XM Radio has exclusive arrangements with every major automaker.
SIRIUS XM Radio products are available at shop.sirius.com and
shop.xmradio.com, and at retail locations nationwide, including Best Buy,
Circuit City, RadioShack, Target, Sam's Club, and Wal-Mart.

SIRIUS XM Radio also offers SIRIUS Backseat TV, the first ever live
in-vehicle rear seat entertainment featuring Nickelodeon, Disney Channel and
Cartoon Network; XM NavTraffic service for GPS navigation systems delivers
real-time traffic information, including accidents and road construction, for
more than 80 North American markets.

This communication contains "forward-looking statements" within the
meaning of the Private Securities Litigation Reform Act of 1995. Such
statements include, but are not limited to, statements about the benefits of
the business combination transaction involving Sirius XM Radio Inc. and XM
Satellite Radio Holdings Inc., including potential synergies and cost savings
and the timing thereof, future financial and operating results, the combined
company's plans, objectives, expectations and intentions with respect to
future operations, products and services; and other statements identified by
words such as "anticipate," "believe," "plan," "estimate," "expect," "intend,"
"will," "should," "may," or words of similar meaning. Such forward-looking
statements are based upon the current beliefs and expectations of SIRIUS' and
XM's management and are inherently subject to significant business, economic
and competitive uncertainties and contingencies, many of which are difficult
to predict and generally beyond the control of SIRIUS and XM. Actual results
may differ materially from the results anticipated in these forward-looking
statements.

The following factors, among others, could cause actual results to differ
materially from the anticipated results or other expectations expressed in the
forward-looking statement: general business and economic conditions; the
performance of financial markets and interest rates; the ability to obtain
governmental approvals of the transaction on a timely basis; the failure to
realize synergies and cost-savings from the transaction or delay in
realization thereof; the businesses of SIRIUS and XM may not be combined
successfully, or such combination may take longer, be more difficult,
time-consuming or costly to accomplish than expected; and operating costs and
business disruption following the merger, including adverse effects on
employee retention and on our business relationships with third parties,
including manufacturers of radios, retailers, automakers and programming
providers. Additional factors that could cause SIRIUS' and XM's results to
differ materially from those described in the forward-looking statements can
be found in SIRIUS' and XM's Annual Reports on Form 10-K for the year ended
December 31, 2007 and their respective Quarterly Reports on Form 10-Q for the
Quarter ended June 30, 2008, all of which are filed with the Securities and
Exchange Commission (the "SEC") and available at the SEC's Internet site
(http://www.sec.gov). The information set forth herein speaks only as of the
date hereof, and SIRIUS and XM disclaim any intention or obligation to update
any forward looking statements as a result of developments occurring after the
date of this communication.

    P-SIRI

    Contacts for SIRIUS XM Radio:

    Andrew FitzPatrick
    SIRIUS
    212.901.6693
    afitzpatrick@siriusradio.com

SOURCE SIRIUS XM Radio

http://www.sirius.com

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