GOOG-411 is some sort of business finding service by Google and its voice-activated, so you can access it from any phone (mobile or land line), in any location, at any time. For free.
Dial (1-800) GOOG-411. Say where. Say what you're looking for. GOOG-411 will connect you with the business you choose.
See it here.
1-800-GOOG-411: Find and connect with local businesses for free from your phone.