i have been using an app called BlackStar. It's free and you can add waypoints with details. i am new to caching and this is the only app (or GPS) i have used so far. Seems very accurate and i have found 7 caches with it so far! i like using my BlackBerry so that i have a camera handy to take a few pics. Plus i can BBM with my caching buddy.
BlackStar App in CrackBerry Store