We have started working on the large "Reductionism" sequence which includes both the "Joy in the Merely Real" and the "Zombies" sub-sequences. They should be available in a couple of weeks.
One of our customers uses a Firefox plugin called downThemAll which, given an podcast feed, will download all the MP3s for you. I suspect this will most closely resemble the outcome you're looking for.
The sequence "A Human's Guide to Words" is now available as a professionally read podcast.
We have started working on the large "Reductionism" sequence which includes both the "Joy in the Merely Real" and the "Zombies" sub-sequences. They should be available in a couple of weeks.