Techical:

Arduino Our current microcontroller of choice.
code, circuits, & construction resources for phyical computing.
ITP'sPhysical Computing site, great resources and tutorials.
Physical Computing A great resourses for physical computing by Dan O'Sullivan.
Troika Tronix software and support for programs such as Isadora developed by Mark Coniglio of Troika Ranch.
Infusion Systems The source of the icubex system. You will find the icubex editor, sensor descriptions and artist examples.

Cultural Practises:
The Art of the Prank
A Hack a Day
Instructables
Core77
RICH.TXT - ART LANGUAGE TECHNOLOGY
EEbeat REPORTS FROM THE FRONTLINES OF ELECTRONIC ENGINEERING
Uber Gizmo Gadget Blog
Shake well before use
Thoughts from the Sidelines Technology, Gadgets and Curiosities (TFTS Blog).
The items We Carry Flickr collection of pictures.

Dunne and Raby.

Artists:

Universal Connections Exhibtion of "objects between analogue and digital."
Troika Ranch is a digital dance theater company whose mission is to create live performances that hybridize dance, theater and interactive digital media, and to share information about their techniques with others.
David Rokeby
Theo JansenGoogle search of his kinetic art work.
Simon Penny
Julia Scher
Scott Snibbe
Ken Goldberg
Norman White
Jim Campbell
Toni Dove
Ken Feingold
Perry Hoberman
Jennifer & Kevin Mccoy
Paul Johnson
Alan Rath
Lynn Hershman
Krzysztof Wodiczko
Janet Zweig
Jeffrey Shaw
Camille Utterback
Steina & Woody Vasulka
Frank Fietzek