Someone on my f-list just posted some very positive results from her switch to the "No-Poo" approach to haircare which she found here http://babyslime.livejournal.com/174054.html. I looked through the comments and it seems like this is working for a lot of people. I had already switched from washing my hair every day, but it would be nice to break my reliance on packaged shampoo. I'm going to give it a try.
Edit: someone sent me another link to the same idea