So does the WaveLAN card "just work"? You don't need to modify the card at all, other than making it fit in the case?

I wonder - would a PCMCIA format, AirPort Extreme compatible 802.11g card work in that slot and give you Extreme speeds? That is, some PCMCIA card that works in a PowerBook's PC card slot with unmodified AirPort Extreme drivers as if it were a real AirPort Extreme card.