Here is a neat post over at Food Storage Moms all about home-made laundry detergent. They even have videos and they break down the cost of making a five gallon bucket full! It is amazingly cheap so head on over there and be surprised I am still using my soap recipe and it is working great. Our clothes are clean and smell very nice after about 5 months of doing it.
You only need three ingredients. Borax, washing soda, and Fels Naptha soap. You can make it in one or more batches. I do 5 at a time because we wash allot of laundry. This really is thrifty, and when you look at organic laundry detergent it is even better cost wise. This laundry detergent doesn't make my son, who is very sensitive and has eczema, break out.