I'd wager most people wonder wtf .org is all about and why it's not a .com like all the others. But then again those people are not the ones that are gonna wind up at the site. So I find it most likely you two are just imagining two different sets of 'most people'.
existential-risk.org
(Updated 2011-12-16 due to a comment by Nick Bostrom.)
'Existential Risk FAQ' by Nick Bostrom
(2011) Version 1.0
Link: pdf html
'Existential Risk Prevention as the Most Important Task for Humanity' by Nick Bostrom
(2011) Working paper (revised)
Link: pdf html