[tedsuo]

Two bits: Not that it isn't really elegant, but the jump from js to coffeescript does not result in a big enough gain for me to want to do it (as opposed to say, the jump from c to python). It foists an extra mental space on my team, as they have to learn to think in both languages, but doesn't give them a different programming environment with different problem solving tools. If we could totally dump js it might be more appealing. As it is, I see coffeescript splitting the js dev community by making code sharing more difficult.