Heartland Institute Exposed: Internal Documents Unmask Heart of Climate Denial Machine. Additional analysis, including a description of plans to convince grade schoolers that climate science is a "major scientific controversy" is available at Thinkprogress.
Feb 19 Update: The Guardian has an interesting follow-up on the consequences of the revealed Hartland documents, including information about a letter from climate scientists to the Institute asking them to "recognise how its attacks on science and scientists have poisoned the debate about climate change policy," and the revelation that the Institute's tax-exempt status is being challenged. There are also claims that one of the released documents is fake. The Toxic Debate Over Climate Science has an interesting take on these developments.