A project Emily Gobeille and I just finished for the March 2010 issue of Boards Magazine. An interactive story that does realtime tracking of the back and front covers of the Boards magazine to control your journey through the playful world of Rise and Fall.

You can download the software and the magazine cover here:
http://www.boardsmag.com/community/blogs/behindthescenes/index.php?p=834

The source code for the project is released open source – check it out here: