pubsub jQ

pubsub.js

(function( $ ) {
    var o = $( {} );
    $.each({
        trigger: 'publish',
        on: 'subscribe',
        off: 'unsubscribe'
    }, function( key, val ) {
        jQuery[val] = function() {
            o[key].apply( o, arguments );
        };
    });
})( jQuery );
$.getJSON('http://search.twitter.com/search.json?q=dogs&callback=?', function( results) {
    $.publish( 'twitter/results', results );
});
$.subscribe( 'twitter/results', function( e, results ) {
    $('body').html(
        $.map( results.results, function( obj, index) {
            return '<li>' + obj.text + '</li>';
        }).join('')
    );
});

Observer/PubSub

Wherefore
This is where the objects in a system may subscribe to other objects and be notified by them when an event of interest occurs.
Howto
Using javascript events