I have a Motorola GN825G wireless adapter that worked for a while. When it works, it works great. The bad thing is that after a while, the card powers itself off and from then on, the system refuses to see it. I've seen this behavior with the system booted 10.3 and 10.4. I finally bought a USB wireless dongle that works only with 10.4 and I seem to be pretty happy with it on this Lombard.
I have a feeling my issue is a problem with the motherboard. This machine also refuses to recognize the battery. I've changed everything except the motherboard troubleshooting the battery issue. I refuse to buy a motherboard for a 13 year old machine hoping it will fix the problem. For what I use this machine for, I'll live with it's problems.