...or, as Mr. Pilgrim wrote, "blogging becoming an inaccessible, google-hostile bandwidth hog"
I can see where being able to take a few blogposts with you on your morning jog or plugged into the car radio during your morning commute might appeal, but I think there are better ways to spend that precious ear-time.
Otherwise, though, I find audioblog posts completely useless and annoying.
I can skim a written blog post, even a long one, in a few seconds and get a pretty good idea of what it's on about. If it really tickles my fancy, I can sit down, read it in depth, and maybe even comment on it or link to it in a couple of minutes.
Audio posts are impossible to quickly review. If a person posts a 10 minute audio blog entry, to really get anything from it (meaning: to be able to comment on it meaningfully), you have to listen to the whole thing in sequence. Most people are lousy public speakers (myself included). They repeat themselves, they stumble over words, they clear their throats too much, they cough in your ear, they lose the plot and start to babble, whatever.
Stop it. You're being greedy with the most precious resource the modern plugged-in person has these days: time.
Not much to explain here. Search engines don't index the sound of you harumphing and tapping your pen on your keyboard. Next.
Admittedly probably not much of an issue for the typical soapboxer, but taking part in conversational blogging (comments, trackbacks, Technorati follow-fu) relies on people having convenient chunks of text to quote, link to, and refute. Exactly how does anyone link to that bit during minute 17 of your audio post (after the donut sprinkles fall on the microphone but before the sound of your cat knocking over your spittoon) where you make some technical point that definitely, positively needs refuting?
I had many more words written for this post, but then I read Maciej Cegłowski's audioblogging manifesto, which covered most of the salient points, so, unlike a lot of audiobloggers, I'm going to be brief and respect your time.
Latin is a language,
As dead as can be.
First it killed the Romans,
And now it’s killing me.