Amazon.com Web Services

Since I'm an author and I like to write about technical stuff, I'd really like to be able to use Amazon.com's web services to display books on my DevCampus.com website that relate to the topic(s) covered in an article or whatever text is on the page. Sorta like the way Google AdSense works, but for books. For example, on an article page that covers XML Web Services, I'd like to see the top 4 or 5 search results for XML Web Services (w/ a cover shot image, associate link, price (maybe), isbn, star rating (maybe), etc.) in a simple ASP.NET user/server control package. From what I've looked at so far, it seems like Amazon.com Web Services are up to the task. And it's free to register as a web services developer - nice.

Has anyone ever developed using their web services and if so - what was your experience like? I was going to roll my own "relevant books" feature for the site but figured I would save myself several hours by consuming Amazon.com's Web Services instead.