HN demographics: who where how?

Reading last Hacker Newsletter, it became important for me to understand who publishes and reads on HN.

- How many daily unique visitor? (I know that ~30 000 people subscribed to the Newsletter) - What age are HN readers? HN voters? HN publishers? - Where do they come from?

Among underlying questions: - How do people have time to fetch and read content everyday? - Are those currators mostly students? - Is it possible for a non-american interest content to reach top articles (eg. in the Newsletter)? By that I mean making a linear regression on the localization of the voters.

Please prove me wrong on those!

Or maybe it is only christmas break that made it a student-ish edition...