Finding information on how to use SO is unnecessarily hard. I just posted one question asking about the notification system, and another one about search. I know there's some stuff in some wiki (and I didn't know where the wiki was till now!). There are no prominent links to the wiki anywhere. It's not in the FAQ.
I find SO's documentation scattered in posts, the FAQ, a wiki, podcasts, out on the web... I mean everywhere. It's not like SO is so complicated that its docs can't be easily be aggregated in one organized web page.
A lot of effort is spent on fixing spelling mistakes and such. How about spending some time on pooling the documentation in an organized fashion? Offer reputation or badges for this kind of work.