John Battelle's Searchblog: FeedBurner: Know Your RSS Readers

Deeje will like this one... John Battelle reports on FeedBurner, one of what will be a long string of enhancements (either directly, or via service businesses) that a) provide RSS feed usage metrics, and b) turn it into a truly viable marketing channel.

There are still all sorts of inherent issues with RSS syndication for major publishers given how they currently monetize their sites, but operating metrics are a critical first step.