Currently, Non-decoratable Products go into the "create" category on a website, eventhough there isn't a way to bring them into the designer.
I'm creating quite a few products that will have personalization options using "custom fields" and not use the designer (i.e. laser engraved ornaments and Christmas themed items). I don't want to create a decoration area on these items because they won't use decorations from the designer. It's not really a blank product either so neither place makes sense.