Remark on the track-keeping/saving upon shutdown due to empty battery: this works fine. I just tested today, if you let the device run out of steam, once you power it up again and restart maemo mapper, you'll find the track as far as it managed to get it before shutting down.
Great!

BTW I'll be putting the device to the real live test - I'm going to Athens on Wednesday, first time I'll be using mmapper where I really need/want it...