title: Server push: comet vs ape?
body: <p>I've read a little about comet and also APE.</p>
  
  <p>Which one is better? I want the users to see other users updated content. Like Google Wave.</p>
  
  <p>And in comet, there are 2 versions: iframe vs traditional ajax. what is the difference and which is better. I dont quite understand it.</p>
  
  <p>Thanks.</p>