I don't like the name "blog." It sounds like an amalgam of "blah" and "log." Like a mediocre turd, when expectations were high.
By that definition, a "blogger" would be someone who consistently launches mediocre turds under high expectations, and "the blogosphere," well, you can go ahead and guess that one.
This definition isn't too far off the mark for some of the blogs out there, I've sworn off more than one blog for repeatedly swirling around the metaphorical toilet bowl, but I still think there should be a better name for "blogging."
I vote against using any form of the word "diary" though, because that always makes me think of diarrhea.