I just tested it with some more keys: yeah, it seems to not register any shift+fn+key combos, except for the one where my fn+N is mapped to a dead key. Anyway: *Point -->* http://wiki.maemo.org/Remapping_keyboard (I always find it odd that this isn't common knowledge among N900 users - knowing how to do this exponentially increased my N900 usability. I can also send you my N900's /usr/share/X11/xkb/symbols/nokia_vndr/rx-51 file, so you can text my exact keyboard map. (Just don't have your default language set to Russian, because my Russian keymap has only Russian characters, and doesn't support the Ctrl-Space for switching characters. I use Fn-Shift [Yes that's mapped so it's different than Shift-Fn] for switching layouts.

Cool, glad to hear it, thank you.