Better Weblogs

Dave Weinberger speculates on some factors that contribute to Web log success. Many of his conjectures are familiar, but the final point is intriguing: do Web logs that focus on a specific topic last longer and grow faster?

There's remarkably little good information on cultivating a good Web log. There's also too little information on measuring your Web log's impact. How do you know whether your Web log is earning its keep? What should you take into account when thinking about this?