What? You mean a thing that will replicate a large amount of ports for an iBook, or one that has the same ports as an iBook?
I don't know if it would work. Where would you plug it in? Surely it would whack out the bandwidth of a USB port. Even plugging my 'low power' Canon USB scanner into my keyboard with a pro mouse in the other socket gave me a bandwidth warning. And FireWire? I'm not sure about bandwidth for that.
Or do you mean one that will have the old serial and ADB ports?