Co-founders, Skype and JoostRank: 27Why they matter: Call them the Disruptive Duo. First they undermined the music industry by unleashing the Kazaa file-sharing network. Then they rattled the telephone industry by creating Skype, a free Internet phone network.
Now Friis and Zennstrom are ready to reinvent the TV industry with Joost, a full-screen, peer-to-peer TV network that you can watch on your laptop. With 150 channels available and more on the way, Joost is the anti-YouTube: All the video, from anime to
CSI, is created by entertainment pros. More than 500,000 beta users signed up before Joost even opened its doors to the general public, and big-name advertisers -- Coca-Cola, Nike, Sony -- are lining up to become sponsors. TV may never be the same.
Meet 50 Who Matter winner Gina Bianchini. Her site, Ning, lets anyone be a social networking mogul. (more) 
