Not trying to disparage this post in anyway but is an archive even worth it?
If people can afford it, his e-books are such a better value. Yes they are not free but, they are living documents that are updated constantly.
The problem with podcast archive is its going to be full of outdated information quickly.
To me, it seems like creating an archive where people share his updated e-books would be more beneficial but also...you know...piracy.