Here's an index of Kaj_Sotala's articles (not including meta posts):

The Curse of Identity (108)
The Psychological Diversity of Mankind (71)
What is Bayesianism? (67)
The Substitution Principle (64)
Avoid Misinterpreting Your Emotions (61)
Consistently Inconsistent (57)
Fallacies as Weak Bayesian Evidence (54)
I Was Not Almost Wrong But I Was Almost Right (50)
Problems in Evolutionary Psychology (50)
What Cost for Irrationality (50)
Your Intuitions are not Magic (49)
Levels of Communication (49)
A Taxonomy of Bias: The Cognitive Miser (48)
Suffering as Attentional-allocational Conflict (46)
It's Okay To Be At Least A Little Irrational (45)
How to Run a Successful Less Wrong Meetup (44)
Controlling Your Inner Control Circuits (43)
How to Always Have Interesting Conversations (42)
Compartmentalization as a Passive Phenomenon (42)
Fundamentally Flawed or Fast and Frugal (40)
Thoughts on Moral Intuitions (38)
Pain and Gain Motivation (37)
Overcoming Suffering: Emotional Acceptance (35)
What Intelligence Tests Miss the Psychology Of Rational Thought (34)
Are These Cognitive Biases, Biases? (34)
The Tragedy of the Anticommons (32)
Strategic Ignorance and Plausible Deniability (31)
What Data Generated That Thought? (30)
A Rational Identity (30)
SIAI vs. FHI Achivements (2008-2010) (27)
You Cannot be Mistaken About (not) Wanting to Wirehead (27)
Why No Archive of Refuted Research? (25)
Applying Utility Functions to Humans Considered Harmful (25)
Rationalists Should Beware Rationalism (23)
Modularity and Buzzy (23)
Applied Bayes' Theorem: Reading People (22)
5-second Level Case Study: Value of Information (21)
Intelligence Explosion vs. Co-operative Explosion (20)
Heuristics and Biases in Charity (20)
Deliberate and Spontaneous Creativity (20)
Does Blind Review Slow Down Science? (20)
To Like Each Other Sing and Dance in Synchrony (19)
Intuitive Differences: When to Agree to Disagree (18)
Declare Your Signaling and Hidden Agendas (17)
Modularity Signaling and Belief in Belief (16)
Smart Non-Reductionists, Philosophical vs. Engineering Mindsets, and Religion (13)
A Taxonomy of Bias: Mindware Problems (13)
What Epistemic Hygiene Norms Should There Be? (11)
Ethics as a Black Box Function (11)
A Social Norm Against Unjustified Opinions (10)
The Concepts Problem (09)
The Twin Webs of Knowledge (05)

Also see: Yvain's posts and lukeprog's posts.