$24/day+: Daily deals on car rentals in Texas Through 2008
Travelocity

Up to $3 off: Trips to & from airport w/SuperShuttle Through Dec 31
Super Shuttle

Free day on US weekend rentals w/Hertz Through 2008
Travelocity

$7/day+: Great deals on all-sized car rentals Through December 2008
CarRentals.com

$25 off: Weekly rentals one Compact, SUVs & more Through 2008
Budget

$14/day+: US car rentals from top companies Through 2008
Yahoo! Travel

10% off: Any vehicle at Thrifty Car Rental locations Through Jan 31, 2010
Thrifty

$30 off: Weekly US car rentals; no blackout dates Through Dec 2008
Hertz

Up to 10% off: Any vehicle at Dollar Rent A Car Through Jan 31, 2010
Dollar Rent A Car

$13.95+: Daily car rentals in Boston, DC, LA & more Through 2008
Hotwire.com

$30 off: Weekly car rental rates through Dec 15 Through 2008
Hertz

$27/day+: Dallas, TX car rentals from top companies Through 2008
Yahoo! Travel

$13.95+: Daily car rentals in Boston, Dallas & more Through 2008
Hotwire

15% off: Alamo rental cars at participating locations Through Dec 31
Alamo

Under $10+: Cheap car rentals in major cities Through Aug 31
CarRentals.com

Up to 10% off: Any vehicle with Dollar Rent A Car Through 2008
CarRentals.com

Up to 15% off: Hertz car rentals throughout Europe Through 2009
Hertz

$27/day+: Low Dollar car rental deals in Dallas Through 2008
Yahoo! Travel

$24/day+: LA car rental deals from Hotwire.com Through 2008
Yahoo! Travel

Up to $50 off: Monthly car rentals in top cities w/Hertz Through Dec 15
Orbitz

Up to $30 off weekend and weekly car rentals
Editors' Review

$9/day+: Save at over 13,500 car rental locations Through 2008
CarRentals.com