I just wanted to say I love Hacker News.
I'm an introvert and a nerd before I am a female, so I am of course drawn to Hacker News because it's a great place to find other over-sensitive folks who take themselves, their questions, and other peoples' questions very seriously. As others point out again and again, the quality of discourse here is just really high.
Secondarily, but still present, I like Hacker News because relative to other community sites it's very female-friendly. HN is mostly based on ideas, not status/gender/age.
I do wince and get bummed out whenever I read certain comments here (I've pretty much learned to just not even click threads about the ideal age to get married, what's more important relationships or programming, etc) but even when things make me sad, they're at least not crudely written. Basically HN keeps it pretty civil.
Anyway, you folks are great, HN is great, and I think more females will gravitate here for a variety of reasons, most having nothing to do with gender.