Just got my N800 a couple of weeks ago, and am quite happy with it. However -- and there's always a however -- I'm surprised that there's no built-in capability to switch from landscape (i.e., horizontal) to portrait (i.e., vertical) mode. Given that this was something I could do with my Newton back in the stone age, I know that it's not a real challenge.

Is this a hardware limitation, or a software flaw?