Kim Dotcom has held the first party at his mansion since his arrest, telling 100 entrepreneurs that the case against him was hurting New Zealand's economic success.

Senior lawyer Stuart Grieve QC has been given security clearance and appointed to the Kim Dotcom case.

The saga of the Ministry of Social Development's failings certainly drew attention away from that ugly wart of what John Key knew and when about Kim Dotcom, writes Claire Trevett.

John Key has corrected statements he made in Parliament about when he was first told about the Dotcom case by the Government Communications Security Bureau.

Prime Minister John Key will this afternoon correct the answers he gave two weeks ago to questions about what he was told about Kim Dotcom by the GCSB.

John Key has challenged Labour leader David Shearer over claims there is a tape of the Prime Minister discussing Dotcom on a visit to the Government Communications Security Bureau (GCSB) months before Mr Key originally claimed to know the agency was linked to the Dotcom case.

John Key has challenged Labour leader David Shearer to "put up or shut up" over claims he made a quip about Kim Dotcom.

Labour leader David Shearer has refused to comment on reports that his press secretary's partner was the source for apparent GCSB leaks.

Kim Dotcom has issued a call for whistleblowers to leak information about his case to the media in the wake of spy and police blunders.

The GCSB started an investigation into its staff last night after the Labour leader said he'd been leaked information about John Key's knowledge of the Dotcom case.

John Key insists he knew nothing about Kim Dotcom before this year, as new evidence reveals his office was told about Dotcom's bid to buy a Coatesville mansion last July.

A Megaupload user who legitimately stored his data on the file-sharing website is fighting to get his data back in a legal first.

John Key's explanation of how the illegal spying on Kim Dotcom occurred is wrong in law and could not have happened the way he describes, legal experts say.

Kim Dotcom and the Megaupload case was raised with Prime Minister John Key at a dinner attended by top movie moguls in Los Angeles last night.

Kim Dotcom's internet connection was being diverted inside New Zealand weeks before the Government Communications Security Bureau says it started spying on him.

Despite John Key's insistent denials, it now seems to be the case that he actually was briefed by the GCSB on its eavesdropping on Kim Dotcom at a session in February, writes John Armstrong.

Kim Dotcom was mentioned to the PM during a briefing he received from GCSB a month after the Dotcom raid, as an example of how the bureau worked with police.