Lpilsley Cybot:Detailed technical explanations on each subsystem with schematics and pictures with some information reverse-engineered from actual Cybots. Downloadable software is available.
CyBENCH: Circuit diagrams, mailing list, and a tutorial on modifying a commercial car alarm to make a wireless remote control system.
Cybot Revealed 2: Fan site with pictures.
Linbot - A Linux controller for Cybot: Linux-based downloadable software project with the goal of creating a robotics platform suitable for research and experimentation.
Ultimate Real Robots: Product information, articles, and links to other resources.