Getting good ergonomics advice is still really hard. There is a lot of reputable information out there but it can be hard to find out what you should do when you have WristPain (or neck, shoulder, elbow etc pain from sitting in front of a computer all day).
See also: WristPain, MicroPauseSoftware, ErgonomicGuidelines, ErgonomicKeyboards
Repetive-Strain-Injury.com
SlashDot article about the mythical Carpal Tunnel Syndrome. Good recommendations in comments
Deborah Quilter's RSI Help
Cornell University Ergonomics Web
Harvard RSI Action
San Diego RSI Wellness Group
True Carpal Tunnel Syndrome
Support Groups
PortlandOregon has an RSI support group.