Append Div Elements for div.length

[treeleaf20]

All,
I have the following bit of code:

<script>
jQuery(document).ready(function() {
	var url='http://search.twitter.com/search.json?callback=?&q=test';
		jQuery.getJSON(url,function(json){
			jQuery.each(json.results,function(i,review){
				jQuery("#divroller_container").append('<div class="reviews" id=item'+i+'>'+review.text+'<br>Reviewed By: '+review.from_user+'</div>');
				//jQuery("#divroller_container".children()[i]).hide();
			});
		});
	});

	var hiddenDivs = [];

	function start(pause, visible_divs) {
		var container = jQuery("#divroller_container");
		var divs = container.children();
		var visible = visible_divs
		alert(divs.length);
		while (visible < divs.length) {
			var removedDiv = jQuery(divs[divs.length - 1]).remove();
			hiddenDivs.push(removedDiv);
			divs = container.children();
		}
		
		setTimeout( function() {
			roll(container, pause, visible)
		}, pause);
	}
	
	function roll(container, pause, visible) {
		container.prepend(hiddenDivs.pop());
		hiddenDivs.unshift(jQuery(container.children()[visible]).remove());
		
		//Efect
		jQuery(container.children()[0]).hide();
		jQuery(container.children()[0]).slideDown("slow");

		//Repeat
		setTimeout( function() {
			roll(container, pause, visible)
		}, pause);
	}
</script>

<div id="divroller_container">
</div>
<script type="text/javascript">
	start(2000, 1);
</script>

I'm baiscally trying to get some twitter feeds and the rotate them. I can get it and everything like that but for some reason the jQuery doesn't pick up the divs that I appended to the container because when I alert the div.length like this:

alert(divs.length);

The result is always zero. The code works fine if I can populate that value but if I don't have it in the code before hand it doesn't work. However if I add a div to the container like this:

<div id="item1" class="reviews">
	<a href="http://ilkinbalkanay.blogspot.com/2007/11/my-favorite-shell-commands.html">My favorite shell commands</a>
</div>

That same code:

alert(divs.length);

Will output a 1. I'm not sure how to have jquery recognize that I appended the divs earlier. Any help would be great! Thanks in advance!