Peter Linebaugh is interviewed on Doug Henwood's show "Behind the News" about his new book The Magna Carta Manifesto: Liberties and Commons for All published by University of California Press.
The show isn't on the archive page yet, but I'm sure will be up soon. Alternatively it can be downloaded by subscribing to the show via itunes. See details on this page.
An article about the Magna Carta by Linebaugh can be found here.