Glad you like the theme, konttori! It wouldn't have happened without ThemeMaker.
Thanks for asking! These are probably the kinds of things you're already planning, but it would be great if you could eventually add support for the statusbar icons, and expand on the source image. Audio would be nice too, since there isn't yet a standardized way to package replacement sound sets.

Many thanks for all your work; you've made Maemo theme-creation feasible.