Websites
Computer Related Repetitive Strain Injury Comprehensive information about RSI by Paul MarxhausenRepetitive Strain Injury: How to prevent, identify, and deal with RSI by Clay Scott
Harvard RSI Action Student group providing preventative education about RSI
Ergomatters Blog RSI blog by Alan Forsyth
How I beat RSI Personal Story by Justin Bennett
Mind/Body approach* Rachel's RSI homage to Dr. John Sarno
Mind/Body approach* by Nate McNamara
Mind/Body approach* by Romain Thibaux
* The mind/body approach is slightly controversial. A positive mindset certainly helps to recover from RSI but I doubt it'll be long lasting if you don't change your bad working habits at all.
Books
It's Not Carpal Tunnel Syndrome!: RSI Theory and Therapy for Computer Professionals(via amazon.com
/ amazon.co.uk
) 
Deutsche Version