Dynacq International, Inc. v. Yahoo! Inc. [1]

In June 2002, Dynacq International, Inc. subpoenaed Yahoo! seeking the identity of anonymous posters to its Yahoo! Message Board [2].  Yaho0! notified the anonymyous posters, and one John Doe moved to quash the subpoena [3], arguing that the subpoena violated his right to speak anonymously and that the Texas court lacked personal jurisdiction over him.  The court quashed the subpoena in a bench ruling, the details of which are not known.  Dynacq appealed the ruling to the Court of Appeals of Texas, but subsequently withdrew its appeal.