I've been writing a terminal emulator (VT100ish) for Atmel XMegas, and have just started using a 1" wide 128x64 OLED screen as the output.
Here's a picture of it frankensteined to my Raspberry Pi, showing the boot output.
(click for bigger)
Tiny 1" screen
I'm hoping that with the addition of 'cursor key' buttons (or possibly a rotary encoder) for input, it'll be usable as a simple user interface.