Over the summer, Google released Google Maps 3.2 with layers for Windows Mobile. On top of the normal map view, users can overlay traffic information, public transit routes, local items of note including local search results, Wikipedia information, Google Latitude friend locations, and more. You can also use multiple layers for even more information. I caught on BlackBerry OS yesterday that Google has now extended this upgrade to BlackBerry users.
Their accompanying video helps explain how to use layers better than I possibly could with text.
To upgrade, or get Google Maps for the first time, go to http://m.google.com/maps from your BlackBerry browser.



