I have started writing a tutorial for the MDC XULRunner documentation and it will be my first significant Mozpad contribution. I have only written a short introduction so far but I thought I would shoot this link to the moon: XULRunner:Creating custom app bundles for Mac OS X. I would also invite anyone who has experience with this topic to add to the tutorial or at least double-check my work for correctness. I have not written the document yet but it will be based on my recent experiment with WebRunner and my previous experience with CocoaPSYC.app. Update: I have published some work related to this project on google code. Feel free to grab updates from the svn repository or even contact me if you would like to contribute to that project.