Here's a link to an interview / article I did with Boston-based artist Pete Froslie. Pete makes some really nice projects with retro Atari gaming systems, Etch-A-Sketches, proximity sensors, and other cool objects. Above is a picture of his "Anxiety Book" which shuts abruptly when you get too close.

Gizmodo Gallery: Adding emotional characteristics to consumer electronics with Pete Froslie - Link