so I think that the iBooks have the hdd and the optical drives in the same bus, while in powerbooks they are seperate. So I'm not sure if running a 2nd drive in an iBook works, if it did I'm sure it would need to be 'slave.' But thats a pretty sweet product there - I may try to use it in an eventual Mod, probably not this year as I'll start work mid July, so I won't have any money in time. Maybe you could call them to see if it would work in an iBook.