I've finally got my application running under Rockbox on the G5 iPod, and thought I'd send a note about how I got Rockbox installed. Much easier than the Web page makes it look.
1) Connect the iPod to a Windows machine. Download the latest iPodLinux installer and run it, thereby installing the latest bootloader. 2) Plug the iPod into my Mac and unzip Rockbox onto it. 3) Disconnect and reboot the iPod. The iPodLinux bootloader automatically notices Rockbox and presents it as a boot option. About the simulator... I had only one unexpected issue in moving from the Mac simulator to the actual iPod hardware. It was an endianness problem. I was using C type-punning to directly access a binary data structure read from a file. The data was in big-endian byte order, which worked fine on the PowerPC Mac simulator, but not on the actual little-endian iPod ARM. The simulator was also faster than the actual hardward, so my animation loop needed a little tuning. Bill