When Barack Obama picked Delaware Senator Joe Biden as his running mate, there was a group of online gamers that already knew. They weren't political insiders, yet they predicted Joe Biden would get the nod even as the media and blogs were touting other contenders. So who are they? If you've been listening to The Takeaway for the past two months, you know we're talking about the players of our own Veepstakes Game on Facebook. Guests: Veepstakes Game winners Alek Wipperman and Brent Etzel and Stephen Dubner, Takeaway convention correspondent, co-author ?Freakonomics: A Rogue Economist Explores the Hidden Side of Everything?