My BB is also locked to Rogers, but I can't use the BB Maps ap. Before updating the OS I had the capability of seeing the maps and browsing manually, but search didn't work. After the OS upgrade, all I see are grids (no actual maps). Either way, search never worked for me.
I THINK I read somewhere that BB Maps needs a data plan in order to work. Can somebody confirm? If it doesn't, then I'll need to start a new thread as to why mine's not working!