Sadly I do have problem with that :-) You can't use system (GTK based) virtual keyboard in SDL based program (i.e. scummvm) and even if you could, it is not very practical since it takes a lot of screen space on the bottom needed for game. Either scummvm need to have true Maemo backend based on GTK instead of current SDL based one (=lot of work and it would look bad) or virtual keyboard need to be implemented inside scummvm (preferably on left/right side in unused space) which is a lot of work too.