Nice date delta string: 3 minutes ago, 1 hour ago, 16 days ago

jquery.prettyDate.js

// modified from: http://ejohn.org/blog/javascript-pretty-date/
(function($){
    $.prettyDate = function(time){
        var date = new Date((time || ''));
        var diff = (((new Date()).getTime() - date.getTime())/1000);
        var day_diff = Math.floor(diff / 86400);
        if(diff === 0 || isNaN(day_diff) || day_diff < 0){
            return;
        }
        
        //display the hours up to 48, then start counting days after 2
        //days is the final interval
        return (
            diff < 1 && '1 second ago' ||
            diff < 60 && Math.floor(diff) + ' seconds ago' ||
            diff < 120 && '1 minute ago' ||
            diff < 3600 && Math.floor( diff / 60 ) + ' minutes ago' ||
            diff < 7200 && '1 hour ago' ||
            diff < 172800 && Math.floor( diff / 3600 ) + ' hours ago'
        ) || day_diff >= 2 && (
            day_diff + ' days ago'
        );
    };
})(jQuery);