Screens for microcontrolers/small computers Answered

I've been thinking aout making a portable game player/computer, like a Game Boy or PDA, and I think I can handle most of it, except the screen. I don't think I'd be able to easily make my own, and I don't seem to be getting very good results searching on Google (usualy I just end up finding monitors for desktops and devices with screens built into them). I'm looking for anything with at least 64X32 resolution, two colors (black and white maybe?), and enough frames per second to create the illusion of motion. More important, however, is that it should either via standard PC serial port or USB.