Jon Schull attempts to map a conversation thread spread among several blogs.
03/17/03 update: Towards structured blogging.
05/21/03 update: Dynamics of a Blogosphere Story.
04/16/04 update: Sharpreader – Threaded RSS.
11/20/04 update: Technorati vote links… an idea.
11/28/04 update: Re: Conversation Category.
03/31/05 update: How Our Blog Travels Through The Blogosphere.
02/07/06 update: coComment.