A visitor noted that there are lots of links and posts about ergonomic equipment in this blog, but--aside from a few reviews--not too many recommendations. He wanted to know what he should buy. Since I'm just one writer, I can't claim to have tried everything available on the market or even a large portion of what's out there. However, I decide to make a list of what I'm currently using in case some people find that helpful. I have done quite a bit of trial and error, especially with keyboards and mice, to find a set-up that works well for me.
Keyboard: Kinesis Contoured Keyboard from http://www.kinesis-ergo.com/
Mouse: iGesture from the now defunct FingerWorks http://www.fingerworks.com/
Chair: Herman Miller Aeron Chair http://www.hermanmiller.com/
Desk: An L-shaped desk from Office Depot (nothing special here, but avoid desks with keyboard trays/slideouts since they're rarely at the right height) http://www.officedepot.com/
Keyboard Tray: Solution Platform, again from Kinesis.
Voice Recognition Software: Dragon NaturallySpeaking from http://www.nuance.com/
Break Reminder Program: Albion Stop Now from http://www.albionresearch.com/astopnow/
Hope this helps. Good luck!