We've created a new website, the Google Merchant Center, where you can upload your product feeds and make them easy to find on Google Product Search.
If you have been uploading Products through Google Base, your data feeds and account settings have been migrated to the new Merchant Center.
Be sure to bookmark the new Merchant Center page, and see our FAQs for more information.
You can still upload non-product data to Google Base. Use either a data feed or the API and help people find your items when they search.