title: Comet vs Ajax for chatting
body: <p>My site needs a chat room, and I'm also looking to implement a facebookesque person to person chat system.</p>
  
  <p>What is most cost-efficient/performant (purely in terms of bw and server) for me. A regular 1 second poll ajax chat, or a comet solution.</p>
  
  <p>Thanks.</p>