title: Send message to all open clients in browser when they're logged in
body: <p>I got a website in ASP.NET MVC 3.</p>
  
  <p>People can send messages to other peoples inbox and at the moment the only way they get notified is when they a) login, b) do a refresh with post back c) through mail.</p>
  
  <p>But how do I get to send a notification to the right person (httpcontext.identy.user.name is unique if that helps?) and post it on their screen.</p>