A PCMCIA firewire dongle one can get for 23USD, good as a replacement for this IBM original: http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-4NFQ25
It uses the Texas Instruments chipset (better then the Ricoh one). You can use it when you have a dual PCMCIA slot or PCMCIA+ExpressCard like I do in my IBM Lenovo ThinkPad T61, so you can utilize the other...