Kurt,
Is USB an option for you? I can't offer any rock-solid
suggestion(s) for USB WiFi, though. I'm looking into USB
WiF (LinkSys is my first choice so far), but I don't know
yet how viable this is, or what hoops one needs to jump
thru. Only WiFi client that I've used was a WAP54G in client
mode as a test (it worked).
Ed James