HOTEL RESERVATION SITES

Booking Buddy - aggregator of aggregators
CheapOstay.com - Use coupon code HOTEL25 to get up to $25 off
EasyClickTravel - Strong on French hotels
Expedia
HotelClub- kind of hit or miss. Sometimes a great deal can be had.
Hotels.com
Hotelscombined - search many hotel sites at once
Hotwire - Good on last minute hotels
Get A Room - cheap hotel rooms in many major cities
Last Minute Travel - some okay hotel and cruise prices
Orbitz - Fair to middling deals
Priceline
Travelocity
Travelguru - India's biggest hotel and airfare aggregator.