Pixiecurl was into making her own laundry detergent for a while (along with dishwasher detergent). I recall her not liking it very much, but you could probably do some searches and find her reviews.
Personally, I have too much invested in clothing to subject them to this harsh stuff that will fade/wear-them-out faster. I love my Tide, and you'll have to pull the bottle out of my cold dead hands to get me to switch.
I agree she has many DIY household recipes. I make my own dry laundry detergent. 1 cup washing soda, 1 cup borax, and a grated 8 oz. bar of soap. I think I actually got it from Jillee's blog. My next step is homemade dry dishwasher soap. Oh, yes. I made a gallon of liquid hand soap out of an 8oz bar of soap. This has really save us money with having a new baby in the house.