John Battelle 1000th post (congratulations!) on his Searchblog is a great summary on Mary Meeker's "Update on the Digital World."
Meeker: …And if there are hundreds or thousands of thought leaders and motivated, interested parties on the Internet with the ability to publish news or insights into any number of local or global issues, then it is safe to say that these blogs often become both the first source of news, a vital proving ground for authors and a source of potential community for other interested parties. For example, you're probably going to get far more Boston Red Sox specific-content from a blog about the Red Sox made by a die-hard fan than you will from a random sports page, especially if you're after opinions and community.