Adding to my comments below, blogs have had their influence on the news in the past. I can recall a recent case in Germany, where one blog started a media run on a company selling mobile-phone ringtones, condemning their practises of business aimed at teenagers. I am sure similar cases can be found in other countries.But I still think that this kind of publicity is not common for blogs and 98% of all blogs will go unnoticed, passing by like a dark ship in the night.