Someone has started maintaining an "Unofficial" HackerNewsAPI in github:
(I have no first hand experience of using this API)
UPDATE Oct 7 2014:
Hacker News has an official API :
Today we’re excited to launch an
official Hacker News API. We’ve partnered up with Firebase (YC S11) so
that the data we’re ...
They stopped showing average karma because it was gamed by some users.
I reached out to Daniel from Hacker News, for comment;
We used to display average karma but some users were gaming this by
deleting all their comments that didn't get upvoted. I'm not sure the
number is that meaningful.
PG never was on the leader board because he specifically ...