Here is the notice from Google on the new product listing policy...
"We're happy to let you know that as of September 3rd, individual sellers on marketplaces no longer need to submit feeds to Google Product Search. Going forward, marketplaces will be responsible for submitting a feed of all their sellers' items, so we will be retiring your account to avoid duplicate entries on Product Search. [Your marketplace host] will also be responsible for ensuring that your feeds are up-to-date and compliant with our policies.
In most cases, marketplaces already submit feeds of their sellers' items. If you have any further questions about your items or Google Product Search, please contact your marketplace host. We look forward to continuing to display your products, and hope you enjoy the new streamlined submission process.
The Google Team"