At the moment, the only way to enable wifi support is to use a custom build of madwifi with an Atheros patch. You can get it from here: http://bbqsrc.net/eeepc/debian/madwifi-ng.tar.gz

Incase you already haven't, aptitude install build-essential linux-headers-$(uname -r). Then untar the tarball, cd into the directory and "make install".