I’ve said it before and I said it again, and I heard other people say it repeatedly (e.g., Anton): blog is software.
It’s up to every individual (or group, or organization, or company, or political entity) to put it to creative use.
Blog is not content. Content is what someone puts on a blog.
Medium is not the message. Though medium affects the message, of course, and content found on blogs is affected by the ease of use, extremely low cost, and frequency of updating, as well as social communication norms that develop over time.
This, this and this are expansions on that theme, mostly. Interesting reads, nonetheless. What do you think?