Many people have had trouble getting their Atheros AR5007EG wireless devices to work on Linux, let alone getting it to inject data. There is a patch floating around on madwifi.org that allows operation on i386 machines using the MadWifi-ng driver.
I decided to take it a step further by applying the Aircrack-ng patch over the basic AR5007EG patch. Amazingly, it does work, and it works very well. I put the source package up for download here. Just unpack, make, and make install.
Remember, this is for 32-bit systems only. It enables support for the AR5007EG device and allows injection. With injection support, Aircrack-ng is a fun tool to try, as well as Airpwn. Stay legal and enjoy!
June 15, 2008: Cross-platform support is in the works! This is good news for owners of non-i386 systems.
July 29, 2008: This patch is now obsolete! Please refer to newer information.
October 10, 2008: Comments closed. Thank you, spammers.