Well, I've given up on getting my 802.11b card working for now. After digging through my pile of disused hardware, I found a Xircom CBE-10/100BTX Cardbus card. It works fine in Windows, but I'm having some problems getting it set up in Linux.
Booting from the Slackware 8.1 CD and running the PCMCIA script, the card is detected and the tulip_cb module is used. ifconfig -a shows an 'eth0' device. I can assign an IP address to it, but I can't ping my other systems. The link indicator LED on the dongle slowly blinks, about once a second. The hub does not show that it is connected.
My current Slackware 8.1 install, running a 2.4.20 kernel, doesn't seem to do anything with it at all. It is not detected when pcmcia_cs starts up, and doing modprobe xircom_cb does nothing.
Can anyone offer any advice? I know next to nothing about PCMCIA cards, the only things I've ever gotten to work were my USB 2.0 card, which seems to be a PCI card crammed into a PCMCIA form factor, and one of those Orinoco-in-a-PCI-adapter things, which 'just worked'.