Junot Diaz, newly named a MacArthur Fellow for 2012, is a great podcast subject. This "Diaz Distilled in 13 Minutes" Litagogo post from 2009 has links to two great vintage Junot Diaz podcasts:
•a 2007 "Meet the Writers" Barnes & Noble podcast in which Diaz displays his wit and explains his geometric approach to story structure in under 13 minutes, and
•a 2007 "New Yorker: Fiction" podcast in which Diaz reads his classic early story, "How to Date a Brown Girl (Black Girl, White Girl, or Halfie)."
Listening links at the 2009 Litagogo post.