You're right; Maemo Mapper is a lot like using Google Maps on a laptop, except that Google Maps requires constant access to the internet. With a GPS receiver, Maemo Mapper turns into one of those cell-phone-based Google Maps applications, because it can give you turn-by-turn directions to where you want to go. You do have a GPS receiver, right? Because, without a GPS receiver, I think Maemo Mapper would be more or less useless, except maybe as a map browser or as a novelty.

What exactly can you do with your laptop that you want to be able to do with Maemo Mapper? I'm always open to new ideas, although many ideas (like "integrate with kismet" or "render a 3D map") tend only to unnecessarily add memory and/or CPU requirements, and I prefer Maemo Mapper to be lean and mean.