Shampoo-less Hair Washing

© desi.italy
I was talking to a girlfriend this weekend and we got on the topic of dry shampoo. An odd creation to be sure, but one that can come in handy when you're traveling.
Now, I had heard of using talcum powder or corn starch and combing it out, but then you have residue issues. Anyway, I jumped online to see what other options were out. I found quite a few:
- Powder Shampoo
- Conditioner (yes, to wash your hair)
- No-rinse shampoos
- Conditioner
- Body Wash
- Camel urine (OK, maybe only if you're a Bedouin. But it's an interesting bit of trivia)
All natural recipies
What tricks or exotic solutions have you hear of?