http://www.elipsiselectronics.com/B0007MGFFU/details.html If you read the products description and reviews, they're the same word for word from amazon's website (which the product is linked to). Even the image is linked from amazon's website.
To give you a little more information than dzcap did, AWS is descibed by Amazon as: I'd provide a link, but the URL is a mess (Amazon needs to learn how to simplify its request data), so instead you can read about AWS here: http://www.informationweek.com/story/showArticle.jhtml?articleID=172302181
Amazon lets you pull all kinds of product information from its databases using the Amazon E-Commerce Service (ECS) as long as you meet certain requirements for caching the data. The idea is to send traffic to Amazon for people to buy the stuff. You make money by embedding your Amazon Associates ID in the URLs. This is not the only site like this. A friend of mine runs the feedbuzzard store much the same way. If you want to know more about ECS, read this tutorial I wrote about it. If you're at all techie and you have a dynamic site (you can run PHP, Perl, Java, etc.) you can build all kinds of neat little sites. I wrote a simple book price lookup web application in no time at all. You can do some cool stuff with these APIs. (OK, time to take off my geek hat...)
Eric, I'm not sure it's a hat you can take on and off when ever you want. Once a geek always a geek BTW, you're right. With a little ingenuity you can build alsorts of intersting little sites using API's.
From the Google Adsense Policies [ https://google.com/adsense/policies ]: Also the Excessive advertising is prohibited by Google.