power and buttons and network

[sp00ck]

Is possible add knob/rotor for setup, change volume etc.
and outside (on edges) 2-3 buttons

I think the 18650 power will be great but not one but 2 independent. 2 different size (capacity) or old and new
charging separately and use separately. For example when device work i can get battery and put it to flashlight and device still work or... this same. When my computer have less power i can replace one cell from my mp3 player.

I hate sd card, why not using normal usb host A ? normal flash disk for system. cheap and usefull.
And please add irda (infrared)

for increase working time meybe put phisical switch for every system, turn off screen, sound, irda, meybe decrease speed of memory or cpu.