I can confirm that the GPS is NOT locked. I just downloaded the Google Maps application with GPS from
Google Maps over-the-air and it worked instantly. My 8820 is brand new (got it yesterday, activated this morning) and I have not modified the .lbs files or anything. I'm really impressed with the maps- this is my first BB and having maps + GPS + traffic information is awesome.
Also, the GPS found my location in seconds- very accurate, too. Again, I'm impressed. Now I'm off to set up WiFi.