It is not Supported by OSX but there is a Wonderful piece of software (Or Driver) made by OrangeWare.
It works like a Charm! And I find it so much faster then being hardwired with the RJ-45. I prefer to be Wireless, lol.
Check it out:
http://www.orangeware.com/endusers/wirelessformac.html...
I just purchased the D-Link PCI Wireless adapter (DWL-G520) and had installed it in my QuickSilver 2002.
Everything was working fine until the Next Day I went to Start up the computer and it would not boot!! I hear the Start-up Chime and the startup button lights up but thats it. Just Sits...