google voice local search
“it is an experiment on google labs that offers free 411-like service. with google voice local search, you get fully-automated, fast access to same local-business information you would find on google.com. but you can access it from any phone, anywhere, at anytime.”
by calling the above number 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 or get the details by sms if you’re using a mobile phone (just say “text message”).