Are there any areas of study that you feel are underrepresented here, and would be interesting and useful to lesswrongers?
I feel some topics are getting old (Omega, drama about moderation policy, a newcomer telling us our lack of admiration for his ideas is proof of groupthink, Friendly AI, Cryonics, Epistemic vs. Instrumental Rationality, lamenting how we're a bunch of self-centered nerds, etc. ...), and with a bit of luck, we might have some lurkers that are knowledgeable about interesting areas, and didn't think they could contribute.
Please stick to one topic per comment, so that highly-upvoted topics stand out more clearly.
I would like to see tests for rationality discussed, criticized and designed. The equivalent of a IQ but for rationality. Just like for IQ scores it would not have to be perfect to be useful. Knowing a persons level of rationality is incredibly useful if it can be done in a reproducible and accurate way.
I don't know if it can be reliably measured - my impression is that it's pretty damn hard, and that once you heard about most tests (the kind that are used to show irrationality in the first place, i.e. those already discussed on less wrong), you won't fall for them but that doesn't say much about how less likely you are for thinking right in "real life" situations where your brain isn't primed by "this is a test of rationality".
Some sub-components can be reliably measured - such as calibration. Any others?