I have a Ti PWBK 800Mhz the Ethernet Slot has died, I can use the Airport ok. I have looked on the internet but I have been unable to find a PC Card with Ethernet that works on a Mac.
I don't own a laptop, so I can't say if there's a difference between a PCMCIA card and a "PC Card," but I found hundreds of listings for both, so take your pick.