Atheros uses the madwifi package. It works okay. The thing I have YET to manage to figure out is any form of encryption whatsoever. WAP kinda worked, WEP is a wet dream at the moment.
My current plight is getting an AP that isnt a pile of ****. And I dont use that word lightly:
4 different cards on 7 APs that always lock up within an 8hr period.
FC4 works well as can linspire.