Folks in the Interactives Lab introduced me to Troika Ranch a dance team that performs with multimedia. You can see examples of what they do on their YouTube channel or on Net Television. They have created a real-time media tool called Isadora:
Isadora is the award-winning, graphic programming environment for Macintosh and Windows that provides interactive control over digital media, with special emphasis on the real-time manipulation of digital video.
Because every performance or installation is unique, Isadora was designed not to be a “plug and play” program, but instead to offer building blocks that can be linked together in nearly unlimited ways, allowing you to follow your artistic impulse.