In general, a pretty good FAQ, but I do have some criticism. First of all, I'm not sure if I'd put general transhumanist background information (2.1-2.5) under "How Likely is an Intelligence Explosion". I realize that those technologies are relevant to a potential intelligence explostion, but the placement still seems somewhat odd.

Also, you say that "singularity" refers to the intelligence explosion in the FAQ, but in "When will the Singularity happen?", you list predictions of other forms of the singularity. I would recommend adding something to indicate what exactly each source is predicting when they say "singularity". What Ray Kurzweil predicts will happen in 2045 bares little resemblance to what Eliezer Yudkowsky expects to happen by 2060.