If anyone is interested I've finished integrating proper keyboard backlight support into gnome-power-manager (which in turn uses upower to actually control the keyboard backlight) which with any luck will be available in Natty out of the box.
A similar patch should also land upstream too so Fedora etc should get it for free too in their next release too.
In essence this allows us to provide the user with greater feedback and control than say just using pommed (ie. we can dim the keyboard on idle like the lcd display etc, and can display nice notifications of the keyboard backlight level too - see attached screenshot).
If anyone is interested in testing this out, you can use the packages in my ppa and let me know how it works out for you.