Business Insider's Henry Blodget on what LinkedIn's explosive first day on Wall Street means for social media. Then, David-Michel Davies on this year's Webbies, Ayesha Khanna on the Hybrid Age, and the NYPL's fabulous new iPad app, Biblion.

Countries like Ethiopia are censoring web content. Jillian York of the Electronic Frontier Foundation explains. Dan Lyons of Newsweek on Facebook’s clumsy smear of Google. And broadcastr, an app that let’s you listen to-and tell-the city’s stories.

Alix Levine of Cronos Global on extremist websites. Then, Cyrus Farivar on his new book “The Internet of Elsewhere.” Also: Juan, of DreamActivist.org, looks at how social networking can be used to stop deportations.

As part of the First Principles series presented by Demos, the Ayn Rand Center, and It'sAFreeCountry.Org, Brian Lehrer moderates a debate on the true meaning of freedom, and government's role in protecting it. Tonight at 7:30.

At a Crain’s forum Brian interviewed Deputy Mayor Robert Steel on the challenges facing the Bloomberg Administration. Among them: the stagnant construction industry, and providing affordable housing.

OpenNet Initiative’s Jillian York on filtering technology, Jess Bravin of the Wall Street Journal on the .ly domain, the ACLU’s LGBT & AIDS Project asks teens to report on schools that censor gay sites, and more.

POLITICO’s Abby Phillip on Obama’s call for taxes and cuts. Then, a report on his administration’s transparency, the NYC BigApps competition, the NYPL’s real-life video game, and Ben Zimmer on tech companies co-opting words.

New York Law School’s James Grimmelmann and Robert Darnton of the Harvard University Library look at the ruling against the tech company. Plus: When Apple boots apps, and our on-line personalities cross over to real life.

Brian moderates a debate between Miles Rapoport, President of Demos and Yaron Brook, President of The Ayn Rand Institute, as part of the First Principles series.

The International Center for Journalists’ Joyce Barnathan and Small World News’ Brian Conley on the role of non-professional journalists. Then, BBC correspondent Philippa Thomas, and Ben Popper on the birth of Betabeat.com.