It came out on Twitter at 9:21pm EST so it may be awhile before it comes to fruition. The Twitter feed for Wikileaks certainly indicates that this is the mother lode coming out, but considering the recent leak of their own material it is hard to say. (As an aside, I wonder the people who were involved in the Wikileaks resolution for ALA will think of this gigantic disclosure.)
Certainly, it is something to watch. I cringe at the potential revelations contained within and the possibility that people will get hurt or killed from it, but another part of me is excited and curious for the insights that will be found. I certainly hope that there will be some curation of this 60gb collection for the benefit of future generations.