Well, to finally answer my own question:
The Proxim Symphony HomeRF (4432) card is a
3V *only* PC Card, and thus won't even FIT in the CF-01's PCMCIA socket (at least it didn't fit in either of mine). The Symphony Cordless card (4402) is a 5V PC Card, so it should work fine (and apparently does). Unfortunately, there don't seem to be any of those around anymore. Guess I'll go with the Linksys WPC-11 ...
For anyone else attempting to add PC Card peripherals to their CF-01s, keep this in mind: make sure your PC Card is 5V compatible, as 3V (or 3.3V, I think) PC Cards apparently can NOT be used!