"A9.com, Inc. researches and builds innovative technologies to improve search experience for e-commerce applications. A separately branded and operated subsidiary of Amazon.com, Inc., A9.com opened its Palo Alto, California, doors in October 2003. A9.com’s technology will power search on Amazon.com and other web sites.", they are saying in thier website. By this explanation, we don't understand what they are doing. But if you look at thier map service, you will be a A9 enthusiasts. I'm sure. They have a lot of street level images of major cities in the U.S.