It would also be handy if maemo-mapper registered with Opera as the application handler for GPX files.
That way, people could click on the railroad route they wanted to follow, picking from the list of New York State Railroads:
http://rutlandtrail.org/list.cgi

Hmmm.... I tried loading up one of those files, and it seems that maemo-mapper throws an error because of the <metadata> section. If I remove it, then it loads just fine.