Alexander Hayes captured a lot of the brainstorming we did about the interactive podcast idea. You can listen to a couple of podcasts we did to simulate how an interactive podcast might work, using Audacity.
At the end of the day I discussed the idea with Marica and Lynsey and lots of questions surfaced, mainly around the idea of rights of the originating 'author' and how some people may or may not be comfortable with the idea of having others 'annotate' their thoughts and writing (or audio) in this way.
These questions appear in the comments of the Flickr photo posted by mobology. The image is of my A5 "laptop" (and was very effective!).