Crossover between media articles and blog posts
It is not uncommon these days to run across media articles on web sites with comment sections that are awfully similar to the comment sections on blog posts. For example, here is a an article on MarketWatch by Kate Gibson entitled "Fed not in talks on buying mortgage securities" that has inspired 225 comments in just over an hour. On the one hand this suggests that "blogging" has gone mainstream, but on the other hand the articles themselves do not tend to be organized in a "log" form the way blog posts are. Nonetheless, we may in fact be witnessing the coevolution of blogging and media.
Another distinction is that the comment sections on these articles tend to be more of a discussion formum among the commenters rather than a conversation with the author of the article. That makes the article less like a blog post.