WordPress FAQ within the WordPress Answers FAQ
I've been thinking about this same thing.
I think that be should put a lot of WordPress-specific in the FAQ. More specifically I'd like to see a long list of topics with a curated set of links to the best questions/answers on each topic as determined by the moderators.
And I'd expect this would be an ongoing project to surface the best Q&As that do the best job of answering (F)requently (A)sked (Q)uestions (oh the irony! :)