Take it from someone who runs KDE on N800 on a daily basis, it is possible, it does run well. Does everything fit on the screen, not all the time, luckily there is kpager to move windows around to get to everything. Obviously, this is not optimal, but there has been no effort to optimize it. Selecting specific KDE levels and porting the entire suite for use on IT is a welcome and great idea. Nobody is expecting KDE developers to jump on board and rewrite KDE, but nothing is stopping us from doing it.

I agree with mbogosian, why you gotta be hating??