Dan Gillmor has written a book about how the web and blogging in particular are changing the nature of journalism. Its available online here there is a companion blog here. This is the marketing spin:
Grassroots journalists are dismantling Big Media’s monopoly on the news, transforming it from a lecture to a conversation. In We the Media: Grassroots Journalism by the People, for the People, nationally known business and technology columnist Dan Gillmor tells the story of this emerging phenomenon, and sheds light on this deep shift in how we make and consume the news.