I just found out on my N82 that you can rotate the screen with MagicKey. Just define a new preset, and define the following key pairs:
►To rotate 90 degrees(to the right on N82):
Original key: "select any key", I used VolumeUp: 162
Maps to: 174
►To rotate back: "select any key(another than the first one)", I used VolumeDown: 163
Maps to: 175
Now just apply your new preset to All Apps(or any other). If you don't see the difference, try it in the menu(N82 and perhaps others).
Credits to this thread for inspiration:
[Only registered and activated users can see links]
I couldn't find a thread like this one, so I hope it's ok ;)
(It doesn't seem to rotate in N-gage though...)