Blogged audio is a new wrapper for an existing medium. An audioblog is a new medium.
Ryan Shaw >> Embedding Audio and Video in Text
I like the way the New York Times is embedding audio in their frontpage now. The result is a true multimedia document (combining print and audio) not just multiple documents in different media (a podcast or its transcript).
That's the tricky thing about digital albums -- a digital version of a record album is one thing, the medium that happens as a result of the digitization of record albums is another.
My prediction for 2007: it will be the year when that new medium happens.