title: How YQL Cross-Domain works?
body: <p>I was reading <a href="http://net.tutsplus.com/tutorials/javascript-ajax/quick-tip-cross-domain-ajax-request-with-yql-and-jquery/" rel="nofollow">YQL Cross domain ajax request</a>, it's very nice, but I don't know how it works, I mean, does yahoo using proxy or another protocol to get contents of website?</p>
  
  <p>Anyone know how it works?</p>