Calling voice 411 is useful, but itís too expensive and doesn't integrate with the Blackberry address book.
Berry 411 is a free app that provides one click access to yellow page and white page searches from your Blackberry start screen.
To learn more: http://www.thebogles.com/Berry411.htm
Download HERE: http://www.thebogles.com/berry411.zip
It is installed via application manager. Does not require BES/MDS.