This Guy practically does everything, He is connected to everything on the web, just continue reading, you will understand.

1). Marc is an entrepreneur, investor, startup coach, blogger, and a multi-millionaire software engineer best known as co-author of Mosaic, the first widely-used web browser, and founder of Netscape Communications Corporation, Netscape was acquired in 1999 for $4.2 billion by AOL, which made Andreessen its Chief Technology Officer.

2). He was the chair of Opsware, a software company he founded originally as Loudcloud, Opsware was purchased by Hewlett-Packard in September 2007 for approximately $1.6 billion. He is also a co-founder of Ning, a company which provides a platform for social-networking websites.

3).As of June 30, 2008, he is said to be joining the Board of Directors of Facebook. On September 30, 2008, it was announced that he had joined the Board of Directors of eBay. Andreessen is a frequent keynote speaker and guest at Silicon Valley conferences.

4). Andreessen  received his Bachelor's degree in computer science from the University of Illinois at Urbana-Champaign.

5). Andreessen is an investor in social news website Digg and several other early-stage technology startups, like Plazes, Netvibes and Twitter. His latest project is Ning,He serves on the board of Facebook, eBay and Open Media Network, a combined Kontiki (VeriSign) client and media player, launched in 2005. Andreessen is now active in the blogging community. His blog can be found at: http://blog.pmarca.com/

He actually has time to blog, this guy is a genius..it's that simple