Today's two-hour show is all about privacy. Where do you draw the line with what you're willing to share with companies? With the government? Your friends and neighbors? And why? We'll talk about possible solutions to privacy dilemmas, and hear from you about sharing and power dynamics in a world where big corporations and the government know an awful lot. Deborah Estrin of Cornell NYC Tech will talk about health and your small data, and Mary Madden of Pew discusses how teens in your family talk about digital privacy. Plus: computer scientist Jaron Lanier, author of Who Owns the Future?, and Jeff Jarvis, author of Public Parts.