AS 6 will ship with Remoting version 2.5.3, I believe. AS 7 will ship with some version of Remoting 3.
Remoting 3 is a completely different code base from Remoting 2, with a completely different set of concepts. I think the properties that will be most noticeable externally are:
1. Connections are symmetric. That is, once a connection is established from host A to host B, it can be used to send from B to A as well. The asymmetry of callbacks will be gone.
2. The default transport will support multiple "conversations". So, in principle, it should be possible for a server to support all its services with a single port. Administrators will be happy.
Thanks for your answer. So we have to change our article. ;-)