[apgwoz]

Hacker News is written in arc. The first reddit was written in Common Lisp. clisp, specifically, I believe.

Aaron convinced them to do it in his web.py and it was rewritten in a weekend (or so the story went). Later, it was written in Pylons and open sourced. No idea these days.

[TeMPOraL]

Ouch. Mixed character, that's for sure, but I guess no hero is perfect.

[p_l]

Well, their Common Lisp setup was hilariously broken, not by fault of the language IMO...