Web services in action
All Consuming is another one of those information-about-weblogs sites, but with a heavy emphasis on books:
This page is the result of several different processes. Inspired by Book Watch, I created a script that visits newly updated weblogs hourly via Weblogs.com [...] The script then looks for links to Amazon.com items and saves them. I then aggregate all that information together to find the most frequently mentioned books. My scoring mechanism is weighted to favor recently mentioned books, so that the list remains fresh, and offers new insight into what the weblog community is reading at the moment.