From Goodbye Blog by Alan Jacobs:

[T]he blogosphere inevitably accelerates the pace of debate to the timetable of daily journalism. In terms of how they treat substantive ideas, blogs are not very different from newspapers: they present an idea and then move on, as quickly as possible, to the next idea. Perhaps there can be, later on, some brief acknowledgment that that idea wasn’t treated fully and adequately—but, as the newsreel in Citizen Kane reminds us, Time is On The March, and bloggers are under enormous pressure to march along with it. [...] Blogs remain great for news: political, technological, artistic, whatever. And they provide a very rich environment in which news (or rather “news”) can be tested and evaluated and revised, as we have seen repeatedly, from cnn’s firing of Eason Jordan to the discrediting of Dan Rather’s story on President Bush’s National Guard service. But as vehicles for the development of ideas they are woefully deficient and will necessarily remain so unless they develop an architecture that is less bound by the demands of urgency—or unless more smart people refuse the dominant architecture. [...] On a smaller scale, the same problems afflict the intellectual and moral environments of the blogs. There is no privacy: all conversations are utterly public. The arrogant, the ignorant, and the bullheaded constantly threaten to drown out the saintly, and for that matter the merely knowledgeable, or at least overwhelm them with sheer numbers. And the architecture of the blog (and its associated technologies like rss), with its constant emphasis on novelty, militates against leisurely conversations. It is no insult to the recent, but already cherished, institution of the blogosphere to say that blogs cannot do everything well. Right now, and for the foreseeable future, the blogosphere is the friend of information but the enemy of thought.