Hotwire

I used www.hotwire.com to book a hotel on a recent trip to Chicago, and saved about 50% off of the prices listed on the hotel's website. It's similar to Priceline, but you don't bid. You pick the time, price, and location. Once booked, you find out where you'll be staying. We were very happy with the Affinia Chicago Hotel. It was a beautiful hotel with great service, very close to the Water Tower.