A method, system, and apparatus are provided for maintaining user privacy in a knowledge interchange (“KI”) system. A user may provide privacy preferences relating to their participation in the KI system. The user may identify specific keywords, noun phrases, and contacts that should not be transmitted...http://www.google.com/patents/US20060074863?utm_source=gb-gplus-sharePatent US20060074863 - Method, system, and apparatus for maintaining user privacy in a knowledge interchange system