His explosive book triggered official inquiries and soul-searching in politics and journalism. But one on, Nicky Hager's the only person who's been investigated by the police as a result of what he revealed. At the Centre of Investigative Journalism conference in Wellington, Nicky Hager talked to Mediawatch about lessons learned in the past year, what this week's court challenge to the raid on his home might mean for other journalists - and the prospects for investigative journalism in New Zealand today.