NSA Using Social Network Analysis

"Social network analysis has gained prominence in business and intelligence circles under the belief that it can yield extraordinary insights, such as the fact that people in disparate organizations have common acquaintances. So it did not surprise many security analysts to learn Thursday from USA Today that the NSA is applying the technology to billions of phone records. Computer security experts say it is often more important who is talking to who than what is being said." /Wired News/