"The KK multicontroller can be used on KKPowerTower/Osprey (2 rotors), KKTriCopters (3 rotors), KKQuadroCopters (4 rotors), KKSexyCopters (6 rotors) and the Y configuration KKY6copters (with 6 rotors). The KKmulticopter project was started by Rolf Bakke aka KapteinKUK, and the KK in the name of the project is in his honour."
Home of the KKmulticopter:
RCGroups thread here.
Korean vendor: http://www.kkmulticopter.kr
and Dadde86 is selling assembled boards: http://www.rcexplorer.se