Google has just launched Google hotel finder. Branded an 'experiment,' hotel finder lets you search for U.S. hotels in a given city by date, location on a map, price, hotel class, and user rating. One cool feature: The hotel finder will tell you how the rate listed for your dates compares to the hotel's regular rates. This way, you can see if you're paying more--and how much more--than usual, which can help you decide when to go. You can also create a 'shortlist' of hotels you prefer.
The tool also lets you see photos, read reviews, and book a room (by providing links to other sites like Priceline, Expedia, Hotels.com). I like the tool's clean, uncluttered interface, though Kayak still gives you far more filtering options (such as the ability to only search for hotels that have Internet access and a pool, for instance.)