I have connected "talk" with a mobile client. I manualy can add/join new rooms. Within xabber I even get shown the groups.
But what I*m missing is to get all available rooms listed/visable. To join one I need to type in the exact adress. That's not very handy.
Using pidgin on the destop works to get shown the rooms. How to do it for mobile I don't know.
(as a requirement, the app needs to be open source)