Tellme allows you to speak what your looking for. For example simply say "Coffee" and it will find a local coffee shop for you. Tellme offers GPS navigation, traffic information, maps, local listings and weather.
Tellme only works on certain BlackBerry devices (8800, 8820, 8830, and 8310) and seems to be only working in the USA on AT&T or Sprint for now. To get Tellme simply visit m.tellme.com from your mobile device or go to tellme.com from your computer.