No firmware files are available. The only one is 404'd. Assigning to spb since he maintains the driver, acx.
You can grab the files here : http://www.kazer.org/acx-firmware-20060207.tar.bz2 Either download it to /usr/portage/distfiles or modify SRC_URI. The file will stay there if there's no problem about redistributing it. Enjoy :)
*** Bug 166141 has been marked as a duplicate of this bug. ***
thanks for hosting, I changed the URL
Hello, Hosting files in a random server and building ebuild for hundreds of thousands maybe million users, is lame if not plain stupid. Here is a workaround: wget -P /usr/portage/distfiles/ ftp://ftp.archlinux.org/other/tiacx-firmware/acx-firmware-20060207.tar.bz2
The file was forgotten during a migration. It's back. But adding other sources would indeed be a good idea.