You should buy a card supporting 802.11b and 802.11g with one of these chipsets: 1. Ralink rt2500 2. PRISM/Intersil/Conexant "Frisbee" 3. Realtek IMHO in this order. They offer nice GPLed drivers ;-) Frankly the FreeMAC-Driver for PRISM isn't usable yet. To get a slight overview read this: http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Linux.Wireless.drivers.802.11ag.html Frankly this page hasn't been updated for some time.