I subscribe to the weekly newsletter posted by John Four. In the latest issue of this he provided a link to a free short course in story telling about to be run by iversity. Now this may sound a bit dry to you but I should mention it is modular and that three (out of eight) of the modules are "storytelling in role-playing games", "interactive storytelling in video games" and "alternate-reality gaming". The course runs from October 25th, 2013, ending on December 20th, 2013. Finally no prior knowledge of the subject is required.
Further details can be found here.
TR