[JURIST] Digital free speech group Electronic Frontier Foundation (EFF) [advocacy website] has initiated a class-action lawsuit [press release] against AT&T [corporate website] on behalf of California plaintiffs alleging that the company violated their right to privacy as well as several federal statutes when it allowed the National Security Agency (NSA) [official website] to use its infrastructure to wiretap US citizens. A December Los Angeles Times article [text] quoted an official source as saying that AT&T had provided the NSA access to a 300 terabyte database that stores caller information on every domestic call placed in the US through their infrastructure. An EFF staff attorney anticipates that the government will intervene on AT&T's behalf to support the controversial NSA warrantless surveillance program [JURIST news archive]. Read the EFF complaint [text, PDF] and the EFF case backgrounder. CNET has more.