Modernized version could be interesting. A writing device with good keyboard, designed to work together with smartphone - but not just an external keyboard. Priced at 50 bucks, maybe bluetooth for connectivity, small display and great battery life.
I was thinking RasberryPI duct-taped on a small keyboard (eg happyhacking) and some transreflexive display. Although I'm not sure if RPI would be exactly fitting for this kind of usage. Something which could drive the display directly would be more useful.
fingers crossed somebody releases a case with a lcd screen, battery and keyboard that will accept the raspberry pi. even a build your own kit could be interesting considering the cost of the raspberry pi.
I would love something like this with a barebones Linux CLI distro and wifi. Just a keyboard, a terminal sized screen, and a connection to the Internet. And as I type this, I can't help but feel this might exist.