Just because it doesn't work very well for finger-tapping, doesn't make it a bad tablet UI. Maemo Mapper was designed for stylus operation, mostly because it was created before finger-tapping operation became stylish. Panning around the map is easy to do with your fingers, but most other operations require the stylus.

Personally, I still hate finger-tapping, maybe because I don't like having to constantly clean my screen. But I'll see what I can do about overlaying some on-screen, finger-accessible buttons, at least for zooming.