Here is the schedule showing both SIRIUS and XM channels.
SIRIUS XM Radio Announces Extensive Coverage of 2008-09 College Football Post-Season - Yahoo! Finance
SIRIUS XM's College Bowl Game schedule: (All times ET)
EagleBank Bowl, Washington, DC - Navy vs. Wake Forest
December 20, 11:00 am, SIRIUS channel 122 / XM channel 144 (Navy feed)
New Mexico Bowl, Albuquerque, NM - Colorado St. vs. Fresno St.
December 20, 2:30pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
St. Petersburg Bowl, St. Petersburg, FL - South Florida vs. Memphis
December 20, 4:30pm, SIRIUS channel 122 / XM channel 144 (ESPN Radio feed)
R&L Carriers New Orleans Bowl, New Orleans, LA - Troy vs. Southern Mississippi
December 21, 8:15pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
San Diego County Credit Union Poinsettia Bowl, San Diego, CA - Boise St. vs. TCU
December 23, 8:00pm, SIRIUS channel 120 / XM channel 144 (ESPN Radio feed)
Sheraton Hawaii Bowl, Honolulu, HI - Notre Dame vs. Hawaii
December 24, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Motor City Bowl, Detroit, MI - Florida Atlantic vs. Central Michigan
December 26, 7:30pm, SIRIUS channel 122 / XM channel 144 (TBC Sports feed)
Meineke Car Care Bowl, Charlotte, NC - North Carolina vs. West Virginia
December 27, 1:00pm, SIRIUS channel 122 / XM channel 144 (ISP feed)
Champs Sports Bowl, Orlando, FL - Wisconsin vs. Florida St.
December 27, 4:30pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Emerald Bowl, San Francisco, CA - California vs. Miami
December 27, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
PapaJohns.com Bowl, Birmingham, AL - Rutgers vs. NC State
December 29, 3:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Valero Alamo Bowl, San Antonio, TX - Missouri vs. Northwestern
December 29, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Pacific Life Holiday Bowl, San Diego, CA - Oklahoma St. vs. Oregon
December 30, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Bell Helicopter Armed Forces Bowl, Fort Worth, TX - Air Force vs. Houston
December 31, 12:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Chick-fil-A Bowl, Atlanta, GA - LSU vs. Georgia Tech
December 31, 7:30pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Outback Bowl, Tampa, FL - Iowa vs. South Carolina
January 1, 11:00am, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Konica Minolta Gator Bowl, Jacksonville, FL - Clemson vs. Nebraska
January 1, 1:00pm, SIRIUS channel 122 / XM channel 144 (TD Radio/Sports Byline feed)
Rose Bowl, Pasadena, CA - Penn State vs. USC
January 1, 4:30pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
FedEx Orange Bowl, Miami, FL - Virginia Tech. vs. Cincinnati
January 1, 8:30pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
AT&T Cotton Bowl, Dallas, TX - Texas Tech vs. Ole Miss
January 2, 2:00pm, SIRIUS channel 122 / XM channel 144 (Texas tech feed)
AutoZone Liberty Bowl, Memphis, TN - Kentucky vs. E. Carolina
January 2, 5:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
Allstate Sugar Bowl, New Orleans, LA - Utah vs. Alabama
January 2, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
International Bowl, Toronto, Canada - Buffalo vs. Connecticut
January 3, 12:00pm, SIRIUS channel 122 / XM channel 144 (TBC Sports feed)
Tostitos Fiesta Bowl, Glendale, AZ - Texas vs. Ohio St.
January 5, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)
FedEx BCS National Championship Game, Miami, FL - Oklahoma vs. Florida
January 8, 8:00pm, SIRIUS channel 120 / XM channel 140 (ESPN Radio feed)