Hi everybody, one of the research projects we are involved in is about realtime collaboration. One of the aspects we wanted to investigate was the integration of a chat system within XWiki. I've been working on this lately and I've built a prototype that uses an embedded XMPP server for handling all the communication. I still have to cleanup a bit the code before committing it, but I took a video of how things work. You can find it here: http://youtu.be/0Gwtpu3iVwo (it's FullHD, so make sure to change the video quality and to switch to fullscreen) There are several things we need to address (authentication is one of them), but I think we could have a functional extension pretty soon. It's 1:30am right now, so I will give you more details in a next mail :) Enjoy. Thanks, Fabio