I vowed to try my hand at homemade laundry detergent once our old box of powder from Trader Joe's was gone. That was... two weeks ago? Since then, the laundry has been piling high, waiting for me to fulfill my end of the bargain. I found the recipe here, but doubled the amounts because I didn't think 4.5 cups of detergent would last very long with 1/4 cup of the mixture needed per load. In retrospect, I might go ahead and stick to the proper amounts next time because I wasn't able to stir the ingredients hard or fast enough to avoid the dreaded lumps.
Ah well... it seems to be cleaning the laundry well enough, but I might try this recipe next time to compare/contrast.