[lazybreather]

I would love to know tech stack and architecture of HN. And how it evolved (if it did). And what resources they spend (money, manhours etc) to maintain it.

[beaconstudios]

It's written in arc, a custom dialect of lisp that Paul Graham made.

[mobilio]

http://arclanguage.org/forum

Does look familiar with interface?

[memorable]

It does look a lot like HN, although slightly different in colors, font family, and nav bar.