Mozilla uses node.js for several parts of their architecture: https://hacks.mozilla.org/category/a-node-js-holiday-season/ https://hacks.mozilla.org/category/a-

Mozilla uses node.js for several parts of their architecture: https://hacks.mozilla.org/category/a-node-js-holiday-season/ https://hacks.mozilla.org/category/a-node-js-holiday-season/ (recommended read). It should be stable enough for building a large scale application but maybe not easily for an app as big as Twitter (we are talking about a shit-ton of requests per second). You are not there yet though, are you? :)