Look over this thread, and if you have further questions about GPS, etc., post them there or in that forum... Some other free apps there. Google Maps is good, I think better than BBMaps anyway, I don't even load BBMaps any longer.
http://www.blackberryforums.com/gps-...ations-bb.html

Telenav is $9.99 per month, and it is good, the best.