Google Voice Local Search is Google’s experimental service born after the spectatives of the Google phone to make local-business search accessible over the phone.
To try this service, just dial 1-800-GOOG-411 (1-800-466-4411) from any phone.
Using this service, you can:

• search for a local business by name or category. You can say “Giovanni’s Pizzeria” or just “pizza”.
• get connected to the business, free of charge.
• get the details by SMS if you’re using a mobile phone.Just say “text message”.

This app is not even graduated, but to the phone users will be an interesting service.