Well, my wife is Russian, and does have a fair amount of Russian music encoded. We both officially got our empeg's yesterday (I was waiting until FedEx delivered the 2nd unit before I gave her the first unit as a late Christmas present).

I can't say we'd suffer without it, but if Cyrillic support were available, we could make use of it. Though the idea of having Cyrillic as the only display font might be problematic.