But not even a Herman Miller chair satisfies Steve, who would rather have a chair that goes way up his back for shoulder support, and maybe even an adjustable headrest. The bottom line is that human bodies are so different that what works for one person may be useless for another. High tech isn't the only path to ergonomics, however. For lower back support, you could try something as simple as a pillow or other cushion. Stuff it behind you until you feel comfortable and save yourself a few hundred bucks in the process.
Some gadgets turn out to be ergonomic without saying so, e.g. telephone headsets.
Instead of cradling the phone's handset between your shoulder and neck, which can cause neck pain, you can use the headset to keep both hands free for typing. An adjustable computer stand allows you to change positions and take breaks, generally considered very good ergonomic ideas. The American Occupational Therapy Association has a screen saver you can download from their Website. It reminds you to get up from your desk and stretch, and shows you various stretching techniques. Delete the rest.