"Hard to take this blog post seriously when it gets fundamental facts wrong. The Google Wave client does not speak XMPP as the article implies. Joe Gregorio (a Google employee) listed the key protocols and APIs behind Google Wave a few months back in his post at http://bitworking.org/news... > There are actually 3 protocols and 2 APIs that are used in Wave: > * Federation (XMPP) > * The robot protocol (JSONRPC) > * The gadget API (OpenSocial) > * The wave embed API (Javascript) > * The client-server protocol (As defined by GWT) > The last one in that list is really nothing that needs to be, or will probably ever be documented, it is generated by GWT and when you build your own Wave client you will need to define how it talks to your Wave server. That last bit is the money quote since it invalidates a lot of the enthusiasm in the linked article. Downvoted for inaccuracy." - Dare Obasanjo