Using Greasemonkey to load and use jQuery while being considerate to John's bandwidth

When I googled how to use jQuery in a Greasemonkey script — a script to run on a web page that already loads some other, conflicting, JavaScript framework, like Prototype — I found no script that worked. Not a fucking one. They all contained very wrong bits, and I wander why they're still published. They're still indexed so that people like me can experience more pain. Here's what I came up with after much labor. I believe it is fail-proof.

// ==UserScript==
// @name name
// @namespace namespace
// @description Does jQuery stuff while playing nice with other JavaScript frameworks
// @author Caroline Schnapp
// @homepage http://11heavens.com/using-greasemonkey-to-load-and-use-jQuery
// @include *
// ==/UserScript==
 
// Add jQuery
var script = document.createElement('script');
script.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js';
document.getElementsByTagName('head')[0].appendChild(script);
// When jQuery is loaded
script.addEventListener('load', function(){ 
  jQuery = unsafeWindow['jQuery'];
  jQuery.noConflict();
  /* You put your jQuery code here, which must use the jQuery namespace. See Note. */
}, false);

How it all works — me thinks

My code makes the following assumptions:

• The greasemonkey script is run when the DOM is ready. Greasemonkey just does stuff to a document when it is ready.
• My script adds a script tag to the head and waits till the jQuery library has loaded to do its thing to the body.
• You can use addEventListener with the event 'load' on a script element, and your callback function will be executed when the .js file has finished loading.
• The DOM is already ready at the time you're loading jQuery (see 1st point), so no need to use the jQuery(function {}); construct in your code later on.

jQuery is hosted on Google — I always forget that