Anonymity not a "Free Speech" right

EngrBohn writes " A Federal judge has ruled that anonymous "defamation" on the Internet is not covered under Free Speech". This relates to the case of an anonymous user on Yahoo!, who was making claims about Xircom in chat boards, referring to their products as "faulty" and poorly designed. Recently, Raytheon went through a similar situation. (Link is NY Times: Free Login required).