Fluther is not a blog. Fluther is a forum. I really wish people would realize this distinction, then again there are more people who don’t understand such technologies than do understand, and it’s just one price I pay for having tech knowledge.
I strongly disagree with your statement regarding the “connected community” aspect of the blogosphere. In fact, I loathe that very word. I would find it hard pressed to find someone who believed that StormFront and Daily Kos are in any way communities connected or related to each other.
Blogs tend to revolve around single issues or topics (though variety ones exist), are written by few people and read by many many times more. While they encourage communication and interaction of all people, it’s generally a top down manner of presenting information: here’s my blog post, you read it and comment.
Fluther on the other hand covers each topic or issue equally, is written by a much larger audience, and the fundamental point of it is the interaction between initial author and subsequent commenters. It is an all around method of presenting information. Here’s my idea or question, you read and comment, I and others reply and the conversation evolves.
By my definition, Fluther and all websites in general are NOT a part of the blogosphere.