For the digital humanities portion of the Fall 2014 workshop, I decided to build a database for transmedia stories. One of the sites I had used for this purpose had shut down, and I found that there was a need for a replacement. My attempt can be found at http://storytellingtransmedia.wordpress.com. Ultimately, I decided not to continue with the project, because I found that my own understanding of the nature of transmedia storytelling was shifting during my time in the program.
Edit: I have since come across a group of students at a different university who are creating a database of transmedia stories. You can see their work here: http://www.tmdbonline.org/