xmpp4rails is a xmpp4r wrapper turned Rails plugin...with a few advanced features like user registration and multi-user chat sends.
 
[Note: this is a open project in development.  The features that exist, exist because they are what I need.  If there's an xmpp4r interface that you need let me know, or add it and submit a patch.  I'd like to see a consolidated set of Jabber tools - rather than a dispersed set of functionality across mulitple plugins.  I'm no Rails expert, and even less so on the testing side.  I'm learning and attempting to get coverage up to par - including a stubbed out Jabber server.]
 
This project is currently licensed under the Apache 2.0 license.
 
Any questions, comments feel free to get me at kitplummer(at)gmail.com
 
xmpp4r: http://home.gna.org/xmpp4r/
 
See the actual code or generated rdoc for the interfaces.  To utilize the stubs you need to copy the xmpp
4rails/test/mocks/test/xmpp4rails.rb to your #{RAILS_ROOT}/test/mocks/test subdirectory.
 
There's a simple rake task to do this for you too:
 
rake xmpp4rails:setup
 
To uninstall the stub:
 
rake xmpp4rails:remove