One time I left some raw chicken in the fridge a little longer than I was supposed to and, well, let's just say the meat drawer has never smelled the same since
I don't know if this $50 Oreck thing can handle such horror, but it claims to extinguish day-to-day odors and break down pesticides on produce (!!). The Refrigerator Air Purifier replaces that open box of baking soda, and then some. It eliminates food odors, sterilizes your fridge once every hour, reduces food spoilage, and decomposes agri-chemicals too. No idea how it does this crazy voodoo, and all just on 4 C batteries.
Product Page [Oreck via Red Ferret]