What ever happend to those A4 monitors, the ones that where Higher rather than wider. (Sort of like widescreen on its side)
Many of the LCD's stands have a 'tilt' function where you can rotate the screen 90 degrees and get exactly that... the Dell 1905FP I have at the office can do it, for example. You do need to have a video card with drivers that support it as well though, for it to rotate the video output as well to match the position of the monitor.
Most of the NVidia and ATI cards have an option to rotate the screen.