Marc Andreessen is one smart dude.
Some people know him as the co-author of Mosaic (one of the first web browsers). Some know him as the founder of Netscape. He's done a lot (most recently as the co-founder of Ning). He's made a lot of money in the Internet game and continues to invest in all things Silicon Valley. He's got money in Digg, Netvibes, LinkedIn and Twitter. He also sits on the Board of Directors of Facebook. If something big is brewing online, Andreessen is either involved or has his finger on the pulse of what's happening and where it's going.
Yesterday, he appeared on Charlie Rose for the full hour. If you're interested in understanding how new media is starting to unfold and where he thinks it's going, you should take look: