Yes, it seems odd to me to place such limitations on the blog; requiring it to be fictional, requiring it to be radically new, etc. I am thinking here of Documentary Film, or even conceptual works of art that document non-fiction, real life events and process (Carolee Schneemann's Blood Work Diary, for example) are clearly art. Isn't the blog possibly a raw medium in the sense of material, "stuff" that can be (re)formed or (re)contextualized into meaning, either through code or context?