I met Martin Varsavsky last March at the International Summit on Democracy, Terrorism and Security last March in Madrid, where he'd invited me to join an Internet working group. He impressed me with his energy, vision and genuine belief that people working together could improve the world. Late last year, Martin, a serial entrepreneur, invited me to join the U.S. advisory board for his new company. FON, boiled down, is a way to share Wi-Fi connections securely in a collaborative system that could turn into a global network of inexpensive (or, depending on how one participates) entirely free hotspots. Today, on his blog, Martin announced fairly amazing news for a company so young: FON can now count Google , Skype, Sequoia Capital, and Index Ventures as