Let's get in front of this before it gets out of hand. As I've said 100 times, I love Doc Searls but he's not only trying to ascribe new acronyms to the term "podcasting", he is using it to describe things that aren't quite it, thereby confusing new people as they learn about it. Here's what I see as necessary for something to be a podcast:

1. Must be a discrete and downloadable media file
2. Published in an RSS 2.0 enclosure feed
3. Handled automatically on the receiver end, downloaded and moved to where it needs to be and put in the playlists for your playback device

That's it. It's a really freaking simple concept. A downloadable MP3 is not a podcast - it is a necessary but not sufficient component. He was referring to The Linux Show as a podcast, which unless I'm missing something, is not. [Update: It is now] It does have MP3s archives (which I had to dig like a MF to even find on their site) but I can't find an RSS feed to save my life. You can't subscribe to this and just have it show up. Folks, that's the important part here. Being able to download things is cool, but having them show up automatically and be ready for you to play without your attention being required is the thing. That is what podcasting is.

In summation: podcasting is based on "asynchronous bundles of passion, automatically delivered to your device of choice while you sleep."

Update: For the record, here is the ipodder-dev message in which Dannie Gregoire coined the term "podcaster."