If you want to stick with your pcmcia hard disk, I would go with what cmonex said. Otherwise, I would go for a microdrive instead of a compactflash, just to reduce r/w paranoia
(even though I still have not had a single error...
)
The cf slot can be modified to fit a microdrive, but what about modifying it to fit an ethernet card, with just the port sticking out? Or wifi?
Hmm...