As previously mentioned, you will need a data plan to actually view maps. If you want to just get your location, BBMaps will do that, but it's clunky (you have to get a GPS lock, and then copy/paste your lat/long. I couldn't find a way to just display the lat/long on the dashboard in BBMaps.
There are other options that may be better suited. Check out stinsondog's BB tips for 8800 GPS programs
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Stinsonddog's Blackberry GPS Tips )
Truly, your best option is to get a dedicated GPS device, but the BB8800 is pretty handy as an all-in-one device. I use it all the time for directions (Google maps).
Steve