Hi-tech surveillance is not solely directed by employers at workers. American businesses have always been interested in capturing confidential information and trade secrets from competitors. Today, thanks to computer technology, they are able to spy on one another with more sophisticated means than ever before. What are some of the latest developments in this area? How far can a company go in this direction without crossing the line? Visit the Web site of the Society of Competitive Intelligence Professionals at http://www.scip.org.