Hm. In my silent moments (yes, I do allow for some! It's all about the introspection!) I keep coming back to the same question: what would Foucault think of blogs?
Certainly with blogs we have not merely the Death of the Author, but the Explosion of the Author. The author/reader binary is collapsed, as commenting systems allow the reader to actively respond to text, subjectively reshaping the narrative. It's like a Choose Your Own Adventure book gone awry because with CYOA books you have limited possibilities; blog-narrative allows for as many proliferations as there are respondents.
I think the literary discourse around hypertext literature might delve into this. I really should read some hypertext literary theory if I intend to keep blogging. I guess this is as good a beginning as any!