Nice!<p>Possible alternative may be <a href="https://script.google.com" rel="nofollow">https://script.google.com</a> -> "Script as Web App"<p>Especially when integrating with google's apps for domains and APIs.
You should check out Parse (www.parse.com). You can both send push notifications and write server side scripts using JavaScript using what they call Cloud Code. It's pretty awesome.