When Megaupload founder Kim Dotcom's home was raided in January 2012, US authorities were hoping they'd see him stateside, in court, pretty quickly. It hasn't worked out that way. Dotcom has been smiling on magazine covers and throwing unusual parties to herald his new cloud storage service, Mega.

The legal action moves ahead, however, with the US keeping Megaupload under indictment wit its assets frozen, as arguments over Dotcom's extradition move forward. Last word on the extradition trial was that it had been delayed until August 2013.

In order to mount what they call a proper defense to the extradition claims, Dotcom's lawyers have been asking to see the US evidence against their client. So far, they've been denied; New Zealand government lawyers have been arguing, on behalf of the US, that he should not be given the right to see those documents and that the extradition issue should be decided without lengthy discovery.

Dotcom lost in an appeals court, but now New Zealand's Supreme Court has agreed to hear his case, according to New Zealand's Fairfax Media. No date has been set for the hearing. Whatever the outcome on this discovery issue, Dotcom's successful appeal on this issue means that delays in extradition will continue, and an August hearing on the issue now seems unlikely.

"The Government... raided Mr. Dotcom's residence and business and took his exonerating evidence including emails, copyright takedown compliance, and software code and they refuse to give a copy back," said Dotcom lawyer Ira Rothken in a statement to Ars. "We look forward to the NZ Supreme Court review in the Kim Dotcom case and getting the discovery of evidence needed for a fair extradition hearing."

The Supreme Court hearing is set for July 30.