there’s no need to differentiate between weblogs and web diaries:
what is a weblog/blog?
»A blog is a web page made up of usually short, frequently updated posts that are arranged chronologically — like a what’s new page or a journal. The content and purposes of blogs varies greatly — from links and commentary about other web sites, to news about a company/person/idea, to diaries, photos, poetry, mini-essays, project updates, even fiction.
Blogs posts are like instant messages to the web.
Many blogs are personal, “what’s on my mind” type musings. Others are collaborative efforts based on a specific topic or area of mutual interest. Some blogs are for play. Some are for work. Some are both.« http://www.blogger.com/about.pyra