I can't help suspecting that Eliezer's suggestion that no one should talk about AI, technological singularities, etc., until May was motivated not only by wanting to keep LW undistracted until then, but also by wanting to encourage discussion of those topics afterwards. (He has been quite open about his hope that all his writings on rationality, etc., will have the effect of increasing support for SIAI.)

Whether that's a reason for talking about those topics (yay, Eliezer will be pleased, and Eliezer is a good chap) or a reason for not talking about them (eeew, he's trying to manipulate us) will doubtless vary from person to person.