Yankees, Just saw this - sorry. As far as I know there are no "HTC" WP maps. Bing Maps comes on all Windows Phones, but I believe Nokia phones (which I have not played with) have their own maps in it's place - I could be wrong on that, though. If I'm understanding correctly, Nokia Drive is going to be on all of the WP8 devices, not just the Nokia phones, again, I could be wrong on that. Going from memory, but I think I've read that. I have heard nothing but good things about the Nokia Drive app.
As for Bing Maps, I like them for what I've used them for. I take a look every day before I leave my driveway for work to see the traffic, as they get color codes on the major roads. I don't use the GPS for driving, as I have a Garmin on the dash already, and have had one sitting there since around 2005 or so. Jill is her name (if you go into the settings, the voices have names, and the default one is Jill, so that's what my wife and I call her). When Jill screws up, we say Jill's on crack. 
I have a few times used the Bing to drive, when I knew the name of a place, and wanted to speak it instead of taking the time to stop, type into Jill, and find it that way. The problem is that when you reach a point to turn, you have to tap the screen to get the next direction. That has something to do with a patent having to do with arriving at a navigation point signaling the next verbal direction or something like that, so Microsoft opted to just have you tap screen once you arrive at the nav point, and then it will read you the next one. Tap the screen as many times as you want, it will update and continually tell you the distance to the next nave point until you get there, then the next tap will tell you the following nav point. It works fine, you just have to know that it's not going to automatically tell you after you make the turn, where the next turn is until you tap the screen. Nokia Drive does - works just like the GPS in your car, from what I hear, and from what I recall, that's what'll be in every WP8 device, and yes, if I'm correct about that, then yes, you'll be able to download an entire nation's maps to your phone for offline use. As far as I know, Yes, there were pirated copies of Drive but I don't think it was released for use to other OEMs' phones on WP7 deviecs, but will be on WP8. WP 7.8? I don't know. Haven't heard anything on that.
Does that answer your question as much as possible?
