Hey all, long time lurker here.
I have managed to get Arduino working on the KK2 multi rotor control board.
It has an Atmega324 128x64 lcd, buttons, 3 axis gyro and accelerometer.
source code is too large to post you can find it here. http://www.rchacker.com/diy/arduino-on-the-kk2-multicopter-controller.