Creating maps before they are shown for the first time does not work on Maemo. Currently this leads to a crash at the first start, when the Atlas map is trying to be created. A workaround is described in the development environment page.
Fonts in the control widgets are too big, fonts in the map too small.
A stripped down version of the control box would help. The tabs itself take more than half of its space.
- Unify search input field and routing fields
- Float items in the map (large '+' icon to zoom in, '-' icon to zoom out) instead of the navigation controls
The main menu is missing.
Maemo devices have uncommon partition layouts and sizes. In particular, space on / is quite limited, /home has more and /home/user/MyDocs plenty. Cached data could be written to /home/user/MyDocs/marble. See also XDG Base Directory Specification and Bug 230714.
I have not tested libgps support on Maemo yet.