I needed a USB male to female extension cable, and so I figured I'd use the USB Pro keyboard extention cable that came with my G5. I tried to plug in a USB device and it wouldn't fit... I took a look at it and I had no idea that for some ungodly reason Apple made the cable proprietary, just like they do everything else of theirs... so you can't use it as a USB extention cable, but only as a Pro Keyboard extension cable. So with a pair a pliers, a file, and a piece of scotch tape, you can mod it so it will work with anything. I figured this might be useful to somebody out there, or if anyone else was curious if that would work.