does the emu read wav files of floppy disks?
Yep, but it is a bit slow. I think it's eos 4.61 onwards but I may be mistaken.
How about trying the zip route. It's not the cheapest option however you could use 2 zip drives, one scsi attached to the emu and one usb attached to your ibook.
I have a scsi card connected to my computer but it's in a different room to my emu. I got fed up of constantly unplugging my emus external scsi hard drive and plugging it into the computer. Luckily I had a scsi zip bundled with my emu so I bought off ebay a cheapish usb zip and keep that connected to the computer permanently. Now I only have to swap the zip disks when needed (fat32 formatted on eos 4.7)
I suppose it depends on what your needs are, do you want to use the emu samples in your ibook for processing or sequencing or do you want to dump samples from your ibook onto the emu or something else??