@sevla: considerably higher resolution, but still the exact same screen estate\size. I don't think it's a good idea to reduce the keyboard size further, especially on a non capacitive screen. Else you'd be forced to use the stylus or grow one from your nail

PS: from the n900 demo videos, I saw all the testers were typing very quickly, effortlessly and comfortably. All good signs of a good keyboard. I also had my reservations about the keyboard (3 rows, non centered spacebar, no d-pad... and 3 rows.), but seeing the demo videos relieved me a bit.