Bitcoin is a decentralized digital currency based on an open-source protocol that was designed and created by a pseudonymous developer named Satoshi Nakamoto.
Richard Stallman's talk on "Digital Freedom: the context for Bitcoin"
Max Keiser's talk "On Corporations and the American School of Economics".
Juri Mattila's talk on "legal aspects of Bitcoin".
Birgitta Jónsdóttir's talk titled "No Privacy - No Freedom".
Mike Hearn discusses "The future of Bitcoin: new applications and rebuilding the banking system".
James Mcarthy of the Global Bitcoin Stock Exchange (now defunct), the first person to fly using Bitcoin and also the first person to be detained and deported from the US... also for using Bitcoin, talks on "Bitcoin capital markets".
Official Website: http://bitcoin2012.com/