fjordboy writes "John Battelle has posted a discussion and review of Amazon's new search engine: a9.com. From the article:"What makes this particularly noteworthy is that A9 is built quite literally on top of Google. In short, Amazon has taken the best of Google, and made it, to my mind, a lot better. Sound familiar? Yup, it's what Google did to Yahoo, Yahoo to Netscape...you get the picture." "