There is an outside possibility that pg has rigged HN to give more upvotes to YC-funded companies. It just seems a little unlikely.

I don't think it's rigged as much as human nature. From what I've heard the "admins" (unamed) control what hits the front page and how long it stays there to a certain extent. As such (also from what I've heard) if those admins are YC alumn they would tend to favor YC companies or might even know those people running those YC funded companies.

You can't know until he open sources it!

It is, minus the bits used for spam and vote abuse detection.

http://arclanguage.org

http://ycombinator.com/arc/arc3.tar