Wow, Amazon.com's A9.com site got a crazy makeover. It doesn't look like a search engine anymore. It looks more like an advertisement, and it has its own slogan: "Innovations in search technologies."
The old A9.com is now called OpenSearch, and it's linked to from the home page. OpenSearch is a search aggregator that shows results from many Web sites, including Wikipedia, Answers.com and Microsoft's Live.com. There's also a Product Search for Amazon's products.