Some examples of artists and artwork with a connection to physical computing:

The Millefiore Effect/
FRONT 3.0: www.millefiore.com

Joshua Kinberg/
Shoebox Projector: a.parsons.edu/~jk/10fl/

Danny Rozin/
Wooden Mirror: fargo.itp.tsoa.nyu.edu/~danny/mirror.html

Jim Campbell/
www.jimcampbell.tv

Leo Villareal/
www.villareal.net

Tim Hawkinson/
www.pbs.org/art21/artists/hawkinson

Rebecca Horn/
www.rebeccahorn.org