that looks like the appropriate kit for th ibook, I've been looking for one for a while, never actually found anyone selling them yet, or in fact now as that appears to be out of stock. It uses an internal USB bus.

check this thread for some pics and discussion:

http://www.macmod.com/component/option,com_simpleboard/Itemid,29/func,view/id,4159/catid,10/
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Burt
I break stuff.