Not to ruin your thread, but you're 3 years late with this.
http://www.pocket-lint.co.uk/news/ne...837/view.phtml
Microsoft was selling 360 controllers for PC use even before the 360 was out.
Any standard 360 wired controller will work. you can go to microsofts website to download the drivers.
btw heres a receiver for the wireless controller for windows use
http://www.amazon.com/Xbox-Wireless-.../dp/B000HZFCT2