This is my changes for the Xbox 360 drivers for OS X. This version is best built using 10.6 and Xcode 3.2 if you want PowerPC support and 64-bit Intel Kexts.
The original source can be found here: http://tattiebogle.net/index.php/ProjectRoot/Xbox360Controller/OsxDriver
Building requires Packages for Mac: http://s.sudre.free.fr/Software/Packages/about.html