The new policies for marketplaces and aggregators can be found here.

Google also retired the one at a time upload option on Google Base. Those who have been using that are encouraged to submit through a data feed.For those providers who want Google to host a page for their item for example, if you dont have a website just submit your data feed without anything in the link attribute, and well create a Google Base page for your item, says Google Base Product Manager Ioannis Kalafatis. They have made it easier to link Google Base accounts to Google Checkout. Theres a new page in the settings tab called Checkout, where you can add accounts to Checkout by entering a Checkout Merchant ID.