Google announced on Google+ a new feature added to the bulk uploaded within the Google AdWords portal. You can now restructure product groups with bulk uploads.
Google said you can now add new product groups, change or delete existing ones, and change bids all in one bulk action directly in the bulk upload process.
Google said this will make it "easier and faster" for you to manage your campaigns.
Here is a picture of the uploader:
Forum discussion at Google+.
