Google "is inviting U.S. callers to dial 1-800-GOOG-411 (1-800-466-4411) from any phone to test a voice-activated service free-of-charge that it calls Google Voice Local Search, which is available on its experimental Google Labs site." (Reuters)
How's Google going to monetize this? Probably the same way these Free 411 guys are doing it: contextual voice ads. Seems like another good start-up got eaten, though.
Contextual Phone Advertising