Well, then white and light blue for special characters, on black keys. I've owned both keyboards with these colours and keyboards with yellowish/gold on black, and my preference is clear. Most of all, we need a quiet keyboard. The N900 keyboard is silent and at the same time has a great tactile feedback. I used lots of other keyboards and none had the same feeling, that's a shame. It's really important in my opinion.
i'm also looking forward to a qwertz-layout