I find the new MacBook’s 1280×800 display a little too small to work with comfortably, so I got a new Samsung 22″ monitor, which can display 1680×1050. Aperture & Photoshop are so much nicer on the big screen, and it gives me a lot more room to work in XCode and Interface Builder. Parallels will even let me run a virtual machine in full-screen on one monitor while I work in Mac OS X on the other screen.
