Earlier quoted context omitted.
Being proxied to Server:Apache/2.2.8 (Ubuntu) fyi edit: I don't think the page itself is actually proxied it seems only the static content is.
If the app is behind apache and writing static files for serving things up, and only hitting arc on operations like votes and cache misses then of course it's gonna scale! Especially if the app is read heavy :) Is the HN source code actually open source itself?
yes its in the arc source