I have updated Quick Updates to version 2.03a which now includes support for UPC/ISBN. I highly suggest that everyone install/upgrade this version as it will greatly increase the efficiency of updating these new REQUIRED fields. You can download this update from my website and it should also be available in the downloads section shortly.

I am guessing that UPC and ISBN are going to eventually be used by Google to separate products into the correct categories automatically or something along those lines. They are known for their massive databases so this might not be too far fetched. At the moment their categories are messy and not useful to search products by the product_type.