I can understand not supporting other pads as it forks the Xbox and PC devs as even though the word is if a controller is compatible with the Microsoft Common Controller Driver model it will work with XNA your gona need external libraries and Xbox support will be iffy as it only likes some usb devices.[/quote:ee01fbcb1e]
Standard way of achieving this is by have a platform independent interface and write platform specific classes which implement pc and xbox;)