Comment Re:How about repurposed Android smartphones? (Score 1) 158
Or a raspberry pi with a custom case, lithium ion battery pack, and a small usb touchscreen (LCD or e-ink)? Seems another really hacker friendly option, very low power and printing a custom case means you could theme it anyway you want.
Instead of a touchscreen you could use a LED alphanum display off the usb and hardware buttons off the gpio header. Only really needs a video display when it needs the audio/playlist changed, and a led display is much more visible in light than an LCD.