Has anyone tried the Xbox 360 wireless controller on the PS3? Is there an adapter out there that lets you do this? I assume it would have to be a USB receiver, like the one for Windows. Does the button mapping work okay? I realize it would be without Sixaxis support, but the PS3 controller is a little too small. And would I need the plug n' charge kit? I don't own a 360, so I'm new to this.