title: tomcat or glassfish as comet server?
body: <p>they are both free but i think glassfish has some limitation or when you reach up to a certain nr of users (comet) then you have to pay? is that correct?</p>
  
  <p>if true, could you use tomcat as a comet server?</p>
  
  <p>if not, then which free comet servers are there supporting long polling and iframe?</p>