This new version of Google Maps gives you the ability to do layers. I know this is something that I will use quite a bit. The download/ugrade went seamless but does require a reboot after install.
Layers make it easy to view various types of information on your map and are especially helpful in situations when you’re traveling somewhere new. For example, you can turn on the Wikipedia layer to read entries about nearby places, then use the transit lines layer to help map out a route. Or you can use the My Maps feature of Google Maps to create a collection of places you’re planning to visit on your trip and then use Google Maps for mobile to access it from the road. You can also turn on the Google Latitude layer to see your friends’ locations.
On your BlackBerry you can Upgrade or Get Google Maps HERE!