I just had my first presentation at the Medialab.
It was just a introduction to Arduino itself and a small word about physical computing in general.

Presentation files: Arduino Introduction (pdf, 0,4 MB)

I also showed a demo of my pong with the Arduino and an accelerometer,
not really a replacement for the wii controller, but it’s a start

For the geeks:
I used a 2-axis digital accelerometer called “adxl202 JQC” from Analog Device. For reading the sensor I slighty modified the standard “accelerometer_memsic2125″ code.

For communicating between the Arduino and flash I used the SerialServer from Dan O’Sullivan. It’s not really simple to setup but once its working it works great.

for more information about Arduino check the ‘official’ Arduino site with a lot of tutorials and examples, and a very usefull forum.