Interactive Podcasting?

Podcasting may not seem like a very interactive medium. The podcaster plans, creates, and publishes. Listeners ... well, they listen. A podcast could be embedded in a setting that allows for human interaction (e.g. discussion forum, blog), but on its own it's just an audio file.

A company called Waxxi* was promoting interactive podcasting. Essentially, the interaction takes place at the point of recording. Think of a call-in radio show, recorded and put on the web as an mp3 with a feed.

If you want to check it out, they have a few examples on their site.

I'm posting this mostly for the idea -- that podcast creation might be done in this way. It's sort of like podcasting a lecture/discussion from a live class. What do you think are the strengths and weaknesses when considering it for instructional purposes?

*Note: The Waxxi stuff all goes back to 2006-07. I can't find more recent info. Not sure what happened to them, didn't really take the time to further investigate.