I just got back from a presentation by Massimo Banzi, one of the inventors of the Arduino.
It was the last installment of the Penny Stamps Distinguished Speaker Series sponsored by the U of M
School of Art & Design and it was fascinating.
He spoke to a packed house at the Michigan Theatre in Ann Arbor on his work with Arduino and Interaction Design at SUPSI Lugano.
His talk should be on-line at http://www.facebook.com/PennyStampsSeries at some point.
Inspirational stories, examples of Arduino in industry and the arts, and plenty of anecdotes on design interaction.
Invent, prototype, refine!