For more information regarding the PS3 protocol etc. visit my blog at: http://blog.tkjelectronics.dk/ or send me an email at kristianl at tkjelectronics dot dk.
You could also visit the official wiki: https://github.com/TKJElectronics/USB_Host_Shield_2.0/wiki for information.
All three PS3 Controllers are supported (Dualshock 3-, Navigation-, and Motioncontroller).
- It inspired me to get starting and had a lot of good information for the USB communication
"Tomoyuki Tanaka" for releasing his code for the Arduino USB Host shield connected to the wiimote: http://www.circuitsathome.com/mcu/rc-car-controlled-by-wii-remote-on-arduino
- It helped me a lot to see the structure of the bluetooth communication
Also I would like to thank all the people behind these sites about the Motion controller: