I just received an email about TrafficJam, a sister site to BlogRush.
BlogRush is a syndication ‘widget’ for blogs that bases syndicated content on context and credits. The more page views and clicks your widget receives, the more credits you get. The more credits you get, the more your posts are displayed on other blogs (contextually).
TrafficJam takes all of the page view and click data, throws it into a magic math blender, and spits out a digg-like ranking of the top posts.
This is pretty cool. Instead of using a voting system, it is using actual traffic, and actual interest, to gauge how popular a post is. This will in turn, generate more traffic for those top posts.