Oh thank god, I wrote a bit about this in The Blog Cycle, which was from seven (!) years ago:
dashes.com
"Phew. This old chestnut gets trotted out the first time someone in the community gets press coverage, the first time a blog breaks a news item before the paper of record for that community, or the first time someone makes a transition from blogger to journalist or vice versa. Ultimately, most rational people come to the conclusion that some blogging is journalistic, some journalism happens in the weblog medium, most people are content to have the lines be blurry, and in general the two forms of media are distinct but have some overlap."