Dreamgear Arcade Fighter pad

Have anyone hacked trough one of these?

http://www.dreamgear.net/media/catalog/product/cache/1/image/490x/5e06319eda06f020e43594a9c230972d/D/G/DGPS3-1352-ARCADE-FIGHTER-2.jpg

I opened it and it has all the button contacts on the back of the PCB marked, along with some solder points marked as COM. Is that common ground?

Yes, there is a Thread on it.
http://www.shoryuken.com/showthread.php?t=210642

Not Common Ground.

Theres already a thread on these controllers. No they are not common ground. I had to do a common ground mod in order to use them in a dual mod. Also in order to play them on a ps3 slim, you have to use them through a usb hub.

http://www.shoryuken.com/showthread.php?t=210642&highlight=dreamgear