Psst.. here's a hint if you want to hear some samples of his talks and interviews. Try searching for him on the P2P networks like eDonkey/eMule (BTW, he sells his tapes for cost so you don't need to feel bad about downloading the "samples")
http://www.michaelparenti.org/Michael Parenti is an internationally known award-winning author and lecturer. He is one of the nation's leading progressive political analysts. His highly informative and entertaining books and talks have reached a wide range of audiences in North America and abroad.
"A prolific author, a charismatic speaker, and a regular guest on radio and television talk shows, Parenti communicates his message in an accessible, provocative, and historically informed style that is unrivaled among fellow progressive activists and thinkers." -- Aurora Online, January 2004
"Here at home and throughout the world people are fighting back against the forces of wealth, privilege, and militarism -- some because they have no choice, others because they would choose no other course but the one that leads to peace and justice." -- Michael Parenti