Try looking into the Atmel WLAN driver and Ndiswrapper.
http://atmelwlandriver.sourceforge.net/
-and-
http://ndiswrapper.sourceforge.net/
The first is a Linux driver for Atmel-based WLAN USB devices, and the second lets you use Windows drivers for your WLAN card. Check the compatibility lists to see if this card is known to work.