Did you know you could generate RSS feeds for new products from Amazon? The feeds are based on tags which users can assign to items.
See, for example, the “law” tag. Notice that there is a link to a RSS feed for that tag at the bottom right. There are lots of other, more specific, law-related tags, too. This could be a great acquisitions tool for librarians.
It’s great for personal interests also. There is a tag search box at the top left on the RSS Feed page explanation. Try entering in a favorite subject, author or artist to see if a tag has been created.