I think the disturbing bit might be that the average HN reader is mid 30s male with a bachelor degree, no children and little or no income.
Subdomains (siteexample.blogspot.com) and subdirectories (blogspot.com/example) are currently not supported.
These figures would be for ycombinator as a whole, and not just HN then.
Ahhhh - I knew something was off when it said that 24% of HN visits were from females. There was a recent popular poll on here about demographics that had something like 96% male.