Quote Originally Posted by buildingblocks View Post
sooner or later (I believe) we will be required to submit all products to the appropriate category. This confirms it to me:

http://www.google.com/support/mercha...?answer=160081
I have feeds that include products from the currently required Google Product Categories and I'm using only a single overall category from the taxonomy. The feeds are working fine, with no errors for the Google Product Category attribute.

What the future holds? Who knows. You may be right that we'll arrive at a point that the feed will be required to drill down further, but my hunch is that's quite a ways off.