I'm sure your thinking "Lost it now, she has. Off the deep end, this one is" (or maybe you don't speak like Yoda. I like to imagine that some of my readers have quirky personalities)
Allow me to elaborate. I never thought of ditching shampoo until it became a hot topic on a message board that I frequent. At that time, I was couponing like crazy and had just stocked up on shampoo, so going no-poo wasn't on my short list. I couldn't imagine a way to loose the poo and not have greasy, stringy hair. About a month ago, I decided to look into the method a bit more, after being a bit sick of dandruff or oily hair. I read about it on a few eco-friendly blogs and decided to make the leap.
I've been without shampoo for one month now and I'm amazed at the results. Now, no shampoo does not mean that I don't wash my hair. I do. I just use baking soda, water, and vinegar. It's super easy. I take a cup with a tablespoon or two of baking soda, and add water until it is a little thinner than a paste. Starting at the front of my head, I massage this into my roots and then rinse it away. I follow this with a quick rinse with equal parts apple cider vinegar and water, then rinse it out with just water.
My hair has never felt this healthy. Shampoo strips your hair of it's natural oils. This makes your scalp freak a little bit and make more oil to compensate. If your like me, you are washing all the time to get the rid of the overproduction of oil. Then, I end up with dandruff from shampooing too often. Ah, what a nasty cycle it is. Also, most shampoos contain Sodium Lauryl Sulfate and mineral oils, two things that I avoid putting on my body.
If you'd like more info on going no-poo, this is the best source that I've found so far: Babyslime: Info Shampoo Free. She goes into much more detail about SLS and mineral oil on that page.