This is the third BlackBerry compatible Google Local clone I know of --
One of them is HelloWorld at www.freek.ca
which suports North America wide -- and scrolling horizontally and vertically (using the thumbwheel much like dragging a map around on a PC). That one allows you to enter a city and it goes there and then zooms into it; no need for a list, it uses the Google Local search engine to find the cities; so by default it supports all the cities Google Local supports. So at the moment, I consider the www.freek.ca
software superior to this one at the moment if you need North America wide flexibility -- but with all the competition going on, you never know, and yours is free and has different features that the others do not have. Ultimately it seems like this software would be offered for totally free because so many are starting to offer mobile Google Local.
Seems like Google Maps on a BlackBerry is going to be a popular thing on the 8700 with its EDGE speeds!