My prediction for podcasting & weblogging: It will remain as a method for distributing files via RSS-style subscription. But I don’t think it will have much impact in the blogging area. Most podcasts created by bloggers are simply too boring. They can’t be indexed. Passages can’t be quoted. Most of all: you have to invest a lot more time to get the messages – there are no headlines you could scan.
Update: Somone (no name on site) posted a concept for bookmarking into audio files.