title: Comet implementation for ASP.NET?
body: <p>I've been looking at ways to implement gmail-like messaging inside a browser, and arrived at the <a href="http://en.wikipedia.org/wiki/Comet_(programming)" rel="noreferrer">Comet</a> concept. However, I haven't been able to find a good .NET implementation that allows me to do this within IIS (our application is written in ASP.NET 2.0). </p>
  
  <p>The solutions I found (or could think of, for that matter) require leaving a running thread per user - so that it could return a response to him once he gets a message. This doesn't scale at all, of course.</p>
  
  <p>So my question is - do you know of an ASP.NET implementation for Comet that works in a different way? Is that even possible with IIS? </p>