[ILUG] Best WIFI card for linux?

[Conor Wynne]

I am sure this has been answered before, but in case something new has  
been released since the last advice.

What is 100% OSS and 100% sure to work with full encryption with linux?

I need one really quickly for a friends kids bedroom PC.
PCI or USB is fine

The use of windows drivers is not acceptable, neither is OSS drivers  
without encryption -- I already have two cards which do that and no  
encryption = worse than useless.

Thanks in advance
Conor.