If you go to 4shared, you can find a lot of PDF books that have seen prominent mentions or recommendations around here. For example:
Gödel, Escher, Bach
Probability Theory: The Logic of Science
The MIT Encyclopedia of the Cognitive Sciences
How the Mind Works
The Nature of Rationality
Good and Real
The Strategy of Conflict
You can also take a look at Bostrom's or Hanson's papers, or at SIAI's list of publications. They are pretty interesting.
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I just got an iPad, which means that for the first time in my life it's convenient for me to read long documents from the internet. I've often looked at things and thought, oh, if I ever have some capability to read that, I should. However, I haven't made a list.
So. What documents in pdf form, or long websites, should I read now that I can? Any recommendations?
EDIT: Thanks for the advice. I'm particularly excited to read Godel, Escher, Bach. I've also downloaded the ePub of the Sequences, and I'm going to certainly look at Strategy of Conflict. Thank you very much for the links.