I saw a commerical last night about this and just checked their website and YES they have a gas card deal:

1. Book 3 nights or more between May 19, 2008 to July 6, 2008 and travel by Sept. 1, 2008
2. At booking, use code GAS50
3. A $50 gas card will be mailed to you after your trip

http://www.hotels.com/gas50?id=gas

Free Gas!!!!

Deal ends July 6th so hurry up and book your travel.

Tags: free gas card, hotels.com