Orbitz.com has a coupon ORBDOT35 which can be used to book a hotel for 2 or more nights. I found it at flyertalk it is a really nice website for flyer

Here’s the coupon rules-

Special Offer
Book a qualifying hotel between February 1, 2008, and December 31, 2008, for 2 or more nights for travel between February 1, 2008, and December 31, 2008, via Orbitz and instantly receive $35 off your purchase through the use of the promotion code. To display qualifying hotels, click “I have a promotion code.” and enter the promotion code, then look for hotels marked with the icon “COUPON.” Discount may not be used towards the purchase of a vacation package. Limit one discount per hotel room and one promotion code per purchase. Discounts are not redeemable for cash for any reason. Any attempt at fraud will be prosecuted to the fullest extent of the law. Void where prohibited, taxed or restricted. Orbitz reserves the right to change or limit the promotion in its sole discretion.

I have not try it, so if it works, plz tell me. thx for your help.