Explore: Storytelling

Sound Archives
http://www.radiodiaries.org/ (listen)

soundprint.org (see Producer's guidelines)

American Radio Works
www.americanradioworks.org
http://americanradioworks.publicradio.org/podcast.html

soundportraits.org/education (Listen to Ghetto Life)

talkinghistory.org

Grasp the whole process of the documentary via the CBC's Outfront Tutorial.
Another source is the Digital Storytelling Cookbook