What the files seem to show, in the words of Australian columnist Andrew Bolt, is:
Conspiracy, collusion in exaggerating warming data, possibly illegal destruction of embarrassing information, organised resistance to disclosure, manipulation of data, private admissions of flaws in their public claims and much more.Here is a brief account of some of the disturbing details. Here is an account of how the scandal seems to have broken out (at the end of this one are links that enable you to access the entire archive). For a these-things-will-happen sort of account, go here.
From what I have seen of them, they are a rather shocking picture of how academics act when they have lots of money and power, and a political agenda in which the end justifies the means.