npm module lives here
Current version 0.6.15
$ mrt add firebase
server/main.js
firebase = new Firebase('https://publicdata-bitcoin.firebaseio.com/');
firebase.child("bid").on("value", showPrice);
firebase.child("ask").on("value", showPrice);
function showPrice(snapshot) {
console.log(snapshot.name() + ": " + snapshot.val());
}