Short answer:

Long answer:
Apple's airport extreme cards use a notorious broadcom chipset, which broadcom refuses to release specifications or open drivers for, and therefore, the community has had great difficulty reverse engineering a good driver for the chipset. On x86 machines running linux, users are able to use "ndiswrapper" to use the windows version of the driver under linux, quieting the majority of the need for such a driver and making the potential for a community based driver even less likely. That being said, this project DOES exist, and perhaps might work, but you willl probably have great difficulty getting it to work.