Joshua Taylor created a Bloglines extension to track attention metadata within the Bloglines newsreader. The Chameleon Reader web application is an alternate viewing interface for Bloglines and utilizes Bloglines Web Services. Joshua has a Masters degree in human-computer interaction design from Stanford University and currently works as a researcher for HP labs in Palo Alto.
Chameleon keeps track of which feeds you read, how often, and when. It determines your favorite feeds and links and exposes the usage scores. Very cool!