NIME 2011 in Oslo, Norway was an excellent experience. Below is the presentation I made to go along with the workshop. It works through the basics of creating a UI object in canvas and setting up an AJAX request. Then creating a Ruby on Rails application to serve an interface to anyone with a browser, receive incoming UI changes, and pass them along to an audio application via OSC.
NIME 2011 Workshop Presentation
Associated files for the Workshop presentation above: