My mistake! Diane Horn just informed me of this new positive development. You can subscribe via iTunes but for now I only found 3 shows. The interview of David Korten is available but not the most recent one (aired this saturday) nor the previous one (Tracy Carroll). I wonder why...
The selected category is "music" so that does not seem relevant for interviews but this is definitely an improvement. I still think Diane should have a blog where listeners could get additional information and urls.