A set of monochrome flag icons with transparent background for gnome panel keyboard indicator. It'll probably do for other inidicators of this kind as well.
1. Unpack attached .zip archive into ~/.icons/ folder (so there will be new "flags" folder).
2. Execute `gconftool-2 --type bool --set /desktop/gnome/peripherals/keyboard/indicator/showFlags true` in your favourite terminal emulator.
The package contains icons for all countries mentioned in xkb configuration, i. e. in theory it's complete.
Any feedbacks are welcome.