jdoe,
I have not used one, but there are many companies making PCMCIA cards for both Firewire and USB 2.0. The only limit you will have it whether your PCMCIA Bus can handle 400mps transfer rate or not. This is a picture of the cheapest PCMCIA firewire card I have seen:
It runs about $17.00 here in the U.S.
HEISEI, Alpha Digital, Zonet, & BELKIN all make versions of Firewire cards.
Take Care,
Capt. Richard J. Gentil, Pres.
Naples Air Center, Inc.
Custom Computers of Naples, Inc.