[edit: 15 Aug 2008] Marlene Dobkin de Rios, ten months after this episode first appeared on the web, has decided that she doesn't like it. She insisted that Melitta Tchaicovsky assert control of the copyright and instruct me to remove the interview from the internet. Obviously, this is a profoundly clueless request as I do not control the entire internet (actually she wanted me to remove "the tape" from the internet), but I have removed the interview from the official C-Realm Podcast archive, which is all that I have the power to do.
You can find a discussion of this development on the C-Realm Forum at the Grow Report:
In this 61st episode, KMO plays a recording of Marlene Dobkin De Rios on why she condemns the practice of ayahuasca tourism. Before that, KMO plays a conversation that he recorded back in July in the Iquitos home of Alan Shoemaker with Melitta Tchaicovsky & Pepe Ozan of ArtNetwork Productions.
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Erowid Character Vaults: Marlene Dobkin de Rios: http://www.erowid.org/culture/characters/dobkin_derios_marlene/dobkin_derios_marlene.shtml
Also, on the podcast, I mentioned Rick Kleffel's Agony Column Podcast. You can find his audio interview archive here: http://trashotron.com/agony/indexes/audio_interview_index.htm