An anonymous reader writes "A Court of Appeal judgement released today has ruled in favor of Kim Dotcom and will let him sue the Government Communications Security Bureau (GCSB) alongside New Zealand Police. During the High Court case, it emerged that the GCSB had been illegally spying on Dotcom prior to the raid on his Coatesville mansion, on behalf of the FBI, who now wants the Megaupload millionaire extradited to face trial in the US over copyright infringements."