Last week, Stowe Boyd linked to a cool application called Social Circles, which enables you to graph out the relationships between people on discussion lists based on how often they post, who replies to whom, etc. Unfortunately I don't see an easy way to feed in an existing list archive, but I've contacted Marcos Weskamp about that since it would be fun to graph out a long-running list like JDEV. It'd also be interesting to graph the list over time, since contributors come and go over the years.