At work, we bought an MK802 which is this 70$ ARM device that runs Android or Linux. It includes wifi, hdmi out, and a few usb ports which is pretty crazy!
I decided to run Lubuntu because it was much snappier than Android was and we needed to run Chromium. My only issue was getting Xorg to rotate my display...
I tried using xrandr, but I didn't
Eventually I found out that fbdev is the display driver and that it supports a rotate option. You just have to add