I have a fried with curly thick hair who doesn't use shampoo either. Her hair is GORGEOUS. She just rinses it, and once a week does a sugar-scrub with plain sugar.
Bad Juju - I feel your pain. I have thin baby-fine hair, which is gray on each temple and in my forelock. Unfortunately, if I leave it I end up looking like I have mange (as my hair-cutter-chickie said) because the fine white hair is invisible. Henna is what I use. Haven't used henna in a couple months now, just wanna see if I still look mangy.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson