Google (NASDAQ:GOOGL) is launching a new (very limited) same-day delivery service for retail items, called Google Shopping Express, the company announced on its Google Commerce blog this morning. The trial service is open to a limited amount of people in the San Francisco Bay Area.

Those who sign up will receive unlimited, same-day delivery for free for six months from stores like Target, Walgreen, Staples, American Eagle, Toys "R" Us, Babies "R" Us, and other local retailers. The company said on its blog that the program is in its "incredibly early days and so the service is only available to a small number of people in the Bay Area." Pricing for the service hasn't been set.

Google said it's using this pilot program to test out how the service works, and will expand its testing "as we work out the kinks." The company said that it hopes to make it possible for consumers to get items they order online the same day and at a low cost.

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