Meteor.com runs on meteor, and it survived their own launch, which was bigger than anyone seemed to expect. In practice, that's probably the biggest thing to ru

Meteor.com runs on meteor, and it survived their own launch, which was bigger than anyone seemed to expect. In practice, that's probably the biggest thing to run on meteor at the moment. The framework is built around long lived requests, which push data to the client. There doesn't seem to be anything unscalable about that, since Facebook and many other huge sites are doing it. That essentially leaves node.js and mongo, both of which should lend themselves to scaling pretty well.