He writes Overcoming Bias. Is rather cynical, predicts future involving (i think) libertarianism and stuff that sounds morally bad to present day sensibilities.
Had a gaffe a while ago where he ignored mental trauma related to bodily autonomy, expressed confusion about rape being considered worse than cuckoldry.
On the right hand side of LessWrong, if you scroll down you see Overcoming Bias mentioned as sister site.
http://www.quickmeme.com/Overcoming-bias-guy/popular/1/?upcoming