The listserv archives of the Yale College class of 1975 (with a few gaps in my collection due to mail server bounces) provide a rich collection of documents for a number of uses. I've done stats on number of documents per year, and from whom; how many participants (and subscribers) at various points in time; Pareto or Gini stats on dominent voices. I once or twice looked through posts to see what user mail agents people were using, and what networks. I'm tempted to glean information individuals have revealed about themselves.