I've been working on a tutorial about how to connect Wonderland to (and from) services on the Internet (webservices).
I am a big fan of REST so that's what I chose for the first tutorial that can be found in the community wiki.
The code for the module can be found in my github account: REST sample module, and this is a screencast showing what you can expect from the module:
As per the utility of this module, as it stands it is quite limited, but what I am trying to show here is that it is very simple to connect to external sources, and in the same way that this very simple module sends information to be stored in an external database, other REST communication could be as easily programmed, be it integration with services such as twitter or facebook, or learning management systems such as moodle or sakai.
You can see some similar examples by Bernard Horan in Wonderblog and his youtube channel.
Client communication is not the only way that Open Wonderland can communicate with external services and I have started documenting this topic in this page. Please feel free to contribute; help will be much appreciated.