WordPress.org

This plugin reformats your page to utilize Head JS in your WordPress site.

It strips out all your old javascript declarations and puts them into head.js calls so that they are loaded in parallel (see the Head JS website for more details).

For example, this:

<script type='text/javascript' src='http://yoururl.com/wp-includes/js/prototype.js?ver=1.6.1'></script> 
<script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js?ver=3.0.4'></script> 
<script type='text/javascript' src='http://yoururl.com/wp-includes/js/scriptaculous/wp-scriptaculous.js?ver=1.8.3'></script> 
<script type='text/javascript' src='http://yoururl.com/wp-includes/js/scriptaculous/builder.js?ver=1.8.3'></script> 
<script type='text/javascript' src='http://yoururl.com/wp-includes/js/scriptaculous/effects.js?ver=1.8.3'></script> 
<script type='text/javascript' src='http://yoururl.com/wp-includes/js/scriptaculous/dragdrop.js?ver=1.8.3'></script> 
<script type='text/javascript' src='http://yoururl.com/wp-includes/js/scriptaculous/slider.js?ver=1.8.3'></script> 
<script type='text/javascript' src='http://yoururl.com/wp-includes/js/scriptaculous/controls.js?ver=1.8.3'></script>

Becomes:

<script type="text/javascript" src="http://yoururl.com/wp-content/plugins/headjs-loader/head.min.js"></script> 
<script> 
head.js("http://yoururl.com/wp-includes/js/prototype.js?ver=1.6.1")
    .js("http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js?ver=3.0.4")
    .js("http://yoururl.com/wp-includes/js/scriptaculous/wp-scriptaculous.js?ver=1.8.3")
    .js("http://yoururl.com/wp-includes/js/scriptaculous/builder.js?ver=1.8.3")
    .js("http://yoururl.com/wp-includes/js/scriptaculous/effects.js?ver=1.8.3")
    .js("http://yoururl.com/wp-includes/js/scriptaculous/dragdrop.js?ver=1.8.3")
    .js("http://yoururl.com/wp-includes/js/scriptaculous/slider.js?ver=1.8.3")
    .js("http://yoururl.com/wp-includes/js/scriptaculous/controls.js?ver=1.8.3");
</script>

If you would like to see Head JS added to the Google CDN library (like I would), then go to http://code.google.com/p/google-ajax-apis/issues/detail?id=548 and star the issue.