Looks like 'electronic ink' is finally becoming available. This is a technology that lets you change a display, but the display is permanent, even without power. Looks exciting.
Interestingly, one of the selling points is that these displays are readable in sunlight, like the OLPC computer. I bought one of these, very nice.
Well, Silicon Railway has announced their Arduino clone, which is called the LEDuino. In its basic form it is totally compatible but has a smaller USB port connector, and has a power switch. However, it can also be configured with a DCC interface for railroad buffs, a I2C interface, and/or a CAN interface. Its a well-connected board.
You can read more about it here, or go to their website, or even buy one on EBay. The Arduino original site is here.
I am a family practice trained hospitalist. To offset this, I enjoy meandering about the web, absorbing information about my other loves: electronics, computers, and model railroading.