I can't take any credit for this. I saw it on IBA (Infidel Bloggers Alliance).
If you are even the least bit skeptical that human beings are the sole cause for a change in climate (either warming or cooling), and heck even if you aren't you need to read this.
IBA: "Chronology: FOIA Requests and the ClimateGate Emails"
And you can check out the post that IBA sourced it from The Unbearable Nakedness of CLIMATE CHANGE: "Willis vs. The CRU: A History of (FOI) Evasion"