I just committed some stuff to make it easy to send JMS messages using Seam (EJB makes it nice and easy to receive messages, but sending is still a pain).

Check out the massively simplified chatroom example:

@Stateful
@Name("chatroomAction")
@Scope(CONVERSATION)
public class ChatRoomAction implements ChatRoomActionWebRemote
{

 @In(create=true)
 private transient TopicPublisher topicPublisher;
 @In(create=true)
 private transient TopicSession topicSession;

 ...
 ...

 private void publish(ChatroomEvent message)
 {
 try
 {
 topicPublisher.publish( topicSession.createObjectMessage(message) );
 }
 catch (Exception ex)
 {
 throw new RuntimeException(ex);
 }
 }


}