I did it! I made my own laundry detergent. [beam] Here's how it went down.
Here's the recipe, just to recap:
1 4lb box of Borax
1 4lb box of Washing Soda
1 4lb box of Baking Soda
these three were all in the laundry aisle (actually, they were out of the Washing Soda, but they normally have it)
3 bars of Kirk's Castile soap (you can also use Ivory or Fels Naptha, but apparently this one is all natural)
this was with the regular bar soap in Health & Beauty