Quora's Technology Examined (bigfastblog.com)

A text-only cached version for those seeing Wordpress errors: http://webcache.googleusercontent.com/search?q=cache:QBR2BR2...

This has changed a lot since many of these answers were written. A significant portion, if not the majority, of their application was rewritten in Scala in the past six months.

Source: http://www.quora.com/Is-the-Quora-team-considering-adopting-... and talking with Quora engineers.