4/4
Podcasting 2.0 would be focused on BASIC building blocks - person, transcript, chapters, location, guid, alt enclosure etc.
Podcasting 3.0 would focus on the MONETISATION tags - funding, value, vts, premium content etc
Podcasting 4.0 would focus on DISCOVERY tags - playlists, podrolls, publisher feeds and network feeds etc.
This is just an idea to see how we can help podcast creators better understand all of the podcasting tags without overwhelming them.
I'd love people's thoughts.