Mapsi is a map application, mainly targeted for hikers, hunters, geocachers, fishermen etc. It allows you e.g. to record tracks, save landmarks or to show an arrow that guides you to desired position.
By default Mapsi can use MapQuest's map data for maps of the whole world and, for Finnish users, National Land Survey of Finland's map data for topographic maps of Finland. Besides of that it's also possible to get e.g. Swedish and Norwegian topographic maps to work (see Support website).
More information and free version available at http://talk.maemo.org/showthread.php?p=1004460