Below are a number of resources for preventing and dealing with RSI.
It's Not Carpal Tunnel Syndrome! RSI Theory and Therapy for Computer Professionals by Suparna Damany, MSPT and Jack Bellis 2000
Repetitive Strain Injury: A Computer User's Guide by Emil Pascarelli, MD and Deborah Quilter 1994
The Repetitive Strain Injury Recovery Book by Deborah Quilter 1998
Carpal Tunnel Syndrome and Repetitive Stress Injuries: The Comprehensive Guide to Prevention, Treatment and Recovery by Tammy Crouch 1995
The Mindbody Prescription: Healing the Body, Healing the Pain by John E. Sarno, MD 1998 Recovery Yoga: A Practical Guide for Chronically Ill, Injured, and Postoperative People by Sam Dworkis 1997
Improve Your Vision Without Glasses or Contact Lenses: A New Program of Therapeutic Eye Exercises by Steven M. Beresford 1996
Your wrists hurt, you must be a programmer Good overview of RSI advice and therapies, by former ergo merc Guillaume Marceau.
Ice list: Brown CS repetitive strain community list.
The Sorehand mailing list
MIT's RSI site
Harvard's RSI site
Information about Dr. Sarno's Tension Myositis Syndrome
Typing Injury FAQ
Deborah Quilter's RSI help page
Yoga at your desk