I created a github repo for all of my public xbox stuff. Reversing tools, powerpc code, and source code all in one place for you guys to use. More will be added as I sort through my masses of unsorted xbox tools and reversing folders. Some things may not compile because I had to remove some code to avoid the MS takedown squad. Have fun!
2015 Update
Now all public domain. No encumbering licenses!
Code:https://github.com/mojobojo/PublicXboxStuff