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The previous version of ipw2200 can't be compiled with the linux headers 2.6.20-16-generic (used by Ubuntu 7.04) so here is the way to get the rtap0 interface working.
wget http://superb-west.dl.sourceforge.net/sourceforge/ipw2200/ipw2200-1.2.1.tgz wget http://www.box.net/shared/j3qvacbbmb
tar zxvf ipw2200-1.2.1.tgz tar zxvf ipw2200-1.2.1-inject_patch.tar.gz patch ipw2200-1.2.1/ipw2200.c ipw2200-1.2.1-inject.patch patch ipw2200-1.2.1/Makefile ipw2200-1.2.1-inject_Makefile.patch cd ipw2200-1.2.1 sudo ./remove-old sudo make sudo make install
sudo rmmod ipw2200 sudo modprobe ipw2200 rtap_iface=1
Now you should be able to bring up the rtap0 interface and listen with airodump-ng.
sudo ifconfig eth1 up sudo ifconfig rtap0 up sudo airodump-ng rtap0 -c 11 --bssid 00:0f:e2:xx:xx:xx --ivs -w dump