Which revision is the card?
IOXperts is the site you were referring to:
http://www.ioxperts.com/devices_80211b.html
As far as I know, the only way is to either get the PCMCIA version of to use Linux (don't know exactly if your revision is supported under that either, but I wouldn't be surprised if it is).
I was also checking to see if there might have been a port of NDISulater (aka "Project Evil") for Mac OS X. NDISulator is basically the NDISwrapper for BSD. Unfortunately, I haven't even found anything under that other than some other people looking for the same support under Mac OS X.
