Meteor 0.1.4 is out. The Meteor server now hot-pushes changes to JS, CSS, and HTML files to the browser, automatically, without making you reload the page. It's a leap forward for developer productivity.
Update your copy with
meteor update, or quick start on OS X with
curl install.meteor.com | sh.
In more detail, Meteor's reloading engine now pushes new client-side code and assets to each browser running your application. This is true while developing locally, in production when you deploy a new version with
meteor deploy, and even when you restart a Meteor application bundle running on your own server. Your browser will save the contents of Session before the hot code push, so as long as you're using Collection and Session to hold client state, you'll be right back where you were.
This version of Meteor also includes under-the-cover changes to the live data protocol, but nothing user visible yet. Stay tuned for the next release.