Oh, I use a lot of vinegar and baking soda for house cleaning. My 13 y.o. has asthma, and her doctor actually recommended that I primarily rely on those products for house cleaning.
I haven't compared it myself, but several of my friends tell me that vinegar is more effective than bleach for killing mold and keeping it from coming back. I just switched to vinegar anyway.
It really is cheaper to use these items - especially when you buy them in bulk.