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Chris Beam, Gary Rosen

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Norman Ornstein, Muhammad Yunus

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Peter Hopkins, Jared Cohen

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Allan Sloan, Eric Weiner

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Stephen Colbert's Sport Report

Debra Dickerson, Charles Nesson

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Joe Quesada, Alex Ross

Carl Hiaasen, Frans de Waal

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Angelo Falcon, Bob Dole

Richard Brookhiser, Tad Devine

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Dean Kamen

Eric Alterman, Michael Reynolds

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R.E.M.

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Madeline Albright

Jeff Gore

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John Legend, Mayor Michael Nutter, Chris Matthews

Michelle Obama, The Roots

Philadelphia Eagles Cheerleaders, Gov. Ed Rendell

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Rep. Robert Wexler

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Julia E. Sweig, Jason Riley

Rush

Elizabeth Edwards

Sen. Jim Webb

Lucas Conley

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Eric Roston

Crosby, Stills & Nash

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Dick Meyer

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Gov. Mike Huckabee

Richard Brookhiser

John McWhorter

Laura D'Andrea Tyson

Doris Kearns Goodwin

Adam Brickley, Ron Paul

Gov. David Paterson

Peter J. Gomes

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Robert Lutz

Maria Bartiromo

Jackson Browne

Joe Nocera, Cornel West

Nick Carr

Paul Begala

James Taylor

Dave Levin

Stephen Greenblatt, Naomi Klein

Jim Cramer

Nate Silver

Joe Scarborough

David Gergen, Oliver Stone

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Joseph Stiglitz

Shai Agassi

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Michael Farris

David Frum

Jonathan Alter

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David Simon

Wilco

Charlie Cook, Andrew Sullivan

Indecision 2008: America's Choice

Ambassador Andrew Young

Rachel Maddow

Dan Savage, Kevin Johnson

Bob Woodward

Stephen Moore

Malcom Gladwell

Paul Simon

Michael Lewis

Cory Booker, Thomas L. Friedman

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Barbara Walters

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Geoffrey Canada

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Richard Haass

Michael Phelps