In the last weeks I've been working on a service running on my server that continuously creates fresh offline data (monav offline routing and offline search) and pushes it to the right KDE server. Once I ironed out the last remaining quirks (a handful of regions fails to convert at the moment and my server has too little memory to process very large countries), I'll switch it live such that data processed immediately becomes available inside Marble. That means you'll have the option to update your offline maps every 1-2 weeks in the future. You can track the thing at http://sisyphus.nienhueser.de/ even ;-)