The UK Open University has a series of 9 short interviews with Internet pioneers available on iTunes:

• The Internet at 40 [iTunes link].

Listen to Vincent Cerf, Donald Davies, Tim Berners-Lee, Ray Tomlinson, David Filo and Jerry Yang, "Weld Pond" and "Mudge," and Shawn Fanning.

Even if you know the history of the Internet, you'll probably enjoy these interviews. One of my favorites is the conversation with Rodney Harrison, a Lecturer in Heritage Studies at The Open University, about a his "Cyber Archaeology" research of Second Life.

Note that transcripts of each interview are available as well.