gistfile1.js

    /*
     *  * JavaScript Pretty Date
     *  * Copyright (c) 2008 John Resig (jquery.com)
     *  * Licensed under the MIT license.
     *  */

    // Takes an ISO time and returns a string representing how
    // long ago the date represents.

    function prettyDate(time){
      var date = new Date((time || "").replace(/-/g,"/").replace(/[TZ]/g," ")),
      now = new Date(),
      diff = ((now.getTime() - ((date.getTime()) - (0 * 60000))) / 1000),
      day_diff = Math.floor(diff / 86400);

      return day_diff <= 0 && (
        diff < 30 && "just now" ||
          diff < 60 && "less than a minute ago" ||
          diff < 120 && "a minute ago" ||
          diff < 3600 && Math.floor( diff / 60 ) + " minutes ago" ||
          diff < 7200 && "about an hour ago" ||
          diff < 86400 && "about " + Math.floor( diff / 3600 ) + " hours ago") ||
        day_diff == 1 && "yesterday" ||
        day_diff + " days ago";
    };

    jQuery.fn.prettyDate = function() {
      return this.each(function() {
        var date = prettyDate(this.title);
        if ( date ) jQuery(this).text( date );
      });
    };

    $("a.time").prettyDate(); // Wrap this in a setInterval set at every 30000ms for live updates.

    /* 
     USAGE: "<a class='time' title='" + new Date([YOUR DATE HERE]).toString("u") + "' href='#'></a>" 
     NOTE: The method .toString("u") for the Date object is added my Date.JS (http://datejs.com). 
     */