I have created a USB driver which allows you to use wired XBox 360 Controllers via USB, and wireless XBox 360 Controllers via the Microsoft Wireless Gaming Receiver for Windows, on your OSX machine, including support for the Apple Force Feedback library. The driver is licenced under the GPL.-- Tattiebogle.net - Mac OS X driver [via Engadget]
That's completely awesome. I may be tempted to pick up a 360 Controller now, if I can get one that works on both Windows and OS X. Standardized controller anyone? We could do worse than the 360's design, that's for sure.