Back in 2007, Google had launched a voice based directory service 1-800-GOOG-411 which allowed users to connect to businesses across the US and Canada. This service will be shut down on November 12, 2010.
Google’s 1-800-GOOG-411 became quite popular as a voice based search service which gave you directory assistance to find business around the US and Canada. However, since then Google has improvised this service and also integrated it closely with their mobile OS Android.
Google now has several improvised services such as Google Voice Search for Mobiles which works on iPhone, BlackBerry and Symbian along with Android. They also have several other integrations with Android which allows you to fill in text fields or control your Android device.
Though Google has decided to discontinue the 1-800-GOOG-411 service, users can still find information about businesses by sending a text message to their short number service at 466453 (GOOGLE). In addition to that you can also use the new Gmail Phone Calling feature which allows you to call anyone in US and Canada for free while charging you a small fee for international calls.