JQuery + Rails problem retreiving JSON

Hi guys,

I have a problem retrieving data in JSON format using Ajax with
JQuery.
Here's the code I use:

/app/controllers/stories_controller.rb:

def index
    @stories = Story.all

    respond_to do |format|
      format.html # index.html.erb
      format.xml { render :xml => @stories }
      format.json { render :json => @stories, :callback => params
[:callback] }
    end
  end

/app/views/layouts/application.html.erb
...
<%= javascript_include_tag "jquery" %>
<script type="text/javascript">
    $(document).ready(function(){
        $.getJSON("/stories.json?callback=?", function(data){
            alert(data[2]);
        });
    });
</script>
...

Here's the problem I have...
The alert box that pops up diplays the following:

http://localhost:3000
[object Object]

What's worst is that Rails retreives my data and returns it in a
proper JSON format since when
I enter http://localhost:3000/stories.json I get the JSON file....

What's wrong with JQuery ??? I do exactly what they say on their
Website....

I need help please...

Thx...