Check out the
"no poo" thread on Goneraw.com. Shampoo is apparently a pretty recent development in human grooming, less than 100 years old, and it's just stripping the natural oils out of your hair, when you then replace with conditioner.
I was convinced to give it a try, and it's been 3 weeks or so since I've used shampoo. I just give it a good hot rinse every morning in the shower and massage my scalp a bit. My hair got a bit greasier for a couple of days, then settled down and now seems more or less normal. It looks the same, feels the same, doesn't smell or anything. Nobody else who sees me every day has even noticed. My hair is pretty short, but not buzz-cut short. Apparently it takes more time for longer hair to sort itself out after you stop shampooing.
One of the ingredients in popular shampoos is linked to the formation of cataracts. Yikes!
-Brian