Google Voice Local Search is Google’s experimental service to make local-business search accessible over the phone. And it’s free. Google doesn’t charge you a thing for the call or for connecting you to the business. Regular phone charges may apply, based on your telephone service provider.
To try this service, just dial 1-800-GOOG-411 (1-800-466-4411) from any phone.
Here is a link to the Google site.