Past experience indicates that more than one brilliant, capable person refrained from contacting SIAI, because they weren’t sure they were “good enough”.

Well, who can blame them?

Seriously, FYI (where perhaps the Y stands for "Yudkowsky's"): that document (or a similar one) really rubbed me the wrong way the first time I read it. It just smacked of "only the cool kids can play with us". I realize that's probably because I don't run into very many people who think they can easily solve FAI, whereas Eliezer runs into them constantly; but still.