Yep! Actually it is on the list under "Creative Destruction" I think Diego just rebranded the name recently... and created a few other spin off podcasts. I really enjoy his podcast, especially when I was first getting into Permaculture-- it really helped me learn what other people are doing out there.
Actually my friend was just interviewed permaculture voices... under the recent episode on biochar. Check it out, it is a really informative interview!
Oh. I will have to go and check that I am quite interested in biochar. Especially here in costal region many soils are very well draining and sandy. I learned biochar is a good tool in these soils.