Karl Jacob from CloudMark is speaking now at Supernova. He suggests that many Internet based-businesses (like Classmates.com) essentially sell people to each other: here is some data that I input, here is some data that you input, and the software acts as a trusted-third-party/matchmaker to hook us up. Peer-to-peer networking makes these businesses superfluous: why do I need you to sell me other people, when they can connect with me directly, using distributed search? (Of course, conferences are businesses that sell people to each other, too)