Originally Posted by bryphotoguy

There is no PCI slot in an iBook; I assume you mean PCMCIA. Yes, it's technically a PCMCIA under the keyboard but you won't be able to shut the keyboard if the wireless card sticks out at all. I don't know if there are any cards that are the same exact size as the airport card.
If it has drivers for OS X, you should be fine with the USB dongle. But my personal thoughts are to go out and get the AirPort card on eBay or somewhere. It attaches to an antenna that wraps around the LCD for a better signal. I don't know if those dongles can compete with that sort of thing.
Bryan