Sounds good, looks good! Some years after the first marble answering machine there comes a nice lighten table called Reactable that uses a Tangible User Interface. The Dj/VJ is putting plastic things in the right direction to perform live with a modular synthesizer. (via mail by tom k.)

About: We created Reactable Systems with the vision to redefine the way we interact with computers. Using the knowledge we gained through the Reactable musical instrument we are developing intuitive products focused on the promotion of creativity and the mediation of culture. In order to achieve this we are applying the latest technologies in human computer interaction, music technology, graphics and computer vision.

http://www.reactable.com/
Tangible User Interface on Wikipedia

more posts about computer interaction that could interest you:
http://www.dexflu.eu/blog/index.php/computer-interaction/