There is a very informative article on Yahoo News this morning about laundry detergent, how you don't need it, or certainly do not need near as much! There is also a neat recipe for homemade detergent included. Since I have discussed this with my husband before, I can assure you, due to my desire to be a submissive wife, the Stewart household will not be foregoing detergent all together, nor will we be making our own. We will fall into the category mentioned at the end of the artcle. Check it out here.
Also, Money Saving Mom has a great post on how she saves money on laundry detergent here.