Please can somebody build a case for the Pi Zero in the form factor of the Psion 5?

https://en.wikipedia.org/wiki/Psion_Series_5

(The patents on the folding keyboard will probably have expired by now -- the design dates to 1994-95 -- and with a 30mA draw the Pi 0 is within spitting distance of the sort of power the Psion 5's twin AA cells delivered. Add an e-ink display and a wee USB bluetooth peripheral for i/o (wifi too, if it can be done within battery limits) and it could be the second coming of the form factor of the Sharp Zaurus Z-1 Netwalker (only with a better keyboard and more usefully open software stack):

http://www.engadget.com/2009/08/27/sharps-5-inch-pc-z1-netwa...