Electronics and Robotics

Intro to Electronics from MakingThings
Video from IIT
Circuits and Electronics at MIT OpenCourseWare
Getting Started in Electronics by Forrest M. Mims II
Electronics Learning Lab from Radio Shack
Aruduino starter packs here and here
Gardenbot - a great DIY starter project for the garden!
Fritzing Electronic Design Automation software for documenting and prototyping

BEAM tutorial - low-tech robots from salvaged components.

Forest Mims hand-illustrated electronics books - most widely read in the world.