Douglas Rushkoff is a very smart thinker.
His latest book is called, Life Inc. - How The World Became A Corporation And How To Take It Back, and he has ten other best-selling books on new media and pop culture (including: Cyberia, Media Virus, Playing the Future, Nothing Sacred: The Truth about Judaism, Get Back in the Box: Innovation from the Inside Out and Coercion, winner of the Marshall Mcluhan Award for best media book). He does tons of teaching, public speaking, produces and writes documentaries (The Merchants of Cool and The Persuaders), and has even written a series of graphic novels for Vertigo called, Testament (with another series on the way).
He spoke at the recent Web 2.0 Expo in New York City (November 2009) and his topic was titled: Radical Abundance: How We Get Past "Free" and Learn to Exchange Value Again.
This is a very deep and rich lecture (and well worth your 15 minutes to watch and think about):