A very cool feature in Seam Remoting is the JMS support. This can be useful in asynchronous systems like chats or online games. Today, JMS in remoting is done with polling because the current Servlet standard, doesn't supports Comet. Are you planning to support Comet in the future? Can servers solutions like Jetty be availables in the meaning time? With a feature like this, I think Seam would be the perfect backend to frameworks like GWT.