If the newspapers are worried then here should be their main reason why:  Although their news coverage could remain unrivaled the other parts of their paper are easily replaced by blog posts.  In fact the web is starting to remind me of many of the newspapers media and local sections except the depth and niche coverage of blogs makes newspapers almost irrelevent.  The authors publish their articles as blog posts which gives them an equal chance of being identified as any other blog post.  These sections sell newspapers most likely more than people who just read the news.