JSR 359 has been accepted by Java SE/EE executive committee a month back. Please see the specification request for the content of this revision of SIP Servlet 2.0 specification. We have established a java.net project for cordinating and communicating the progress of the specification. The work is about to get started. At the moment, the expert group is being formed and some of the leading sipcontainer/telco vendors have already joined the group. Here is a short how to wiki on "joining the expert group". I will be using this blog for posting the progress on the JSR. So, please watch this space!