title: Reading <media:thumbnail /> tag with jquery
body: <p>I'm using jquery to read rss tags and their contents. Accessing simple tags like <code>&lt;title&gt;</code> is pretty simple:</p>
  
  <pre><code>$(this).find('title').text();
  </code></pre>
  
  <p>But the thing is rss feeds have funny tags like:</p>
  
  <pre><code>&lt;media:thumbnail width="66" height="49" url="http://news.bbcimg.co.uk/media/images/52693000/jpg/_52693997_011963628-1.jpg" /&gt;
  </code></pre>
  
  <p>And of course, <code>$(this).find('media:thumbnail');</code> is not working... Any idea? Thanks in advance!</p>