Please update the acx ebuild in portage to get wpa-support and compatibility with the new mac80211.
As hinted in red letters, "Gentoo Bugzilla" is not the correct product to file bugs regarding ebuilds. Please use "New -> Gentoo Linux -> Component: Ebuilds" in future.
Created attachment 165097 [details]
quick hack, uses git
Upstream stopped updating given git repository and thus, mac80211 version there.
We are very sorry. I am instead preparing to commit a new, fixed version of net-wireless/acx that works with latest kernels.
Created attachment 220515 [details]
Updated ebuild from an apparently maintained git clone
the attached ebuild uses oli1417's clone and works nicely with a DWL-120+ USB device. I chose to select a specific commit that compiles with currently stable gentoo-sources-2.6.31-r6 after struggling some time to find a working one.
To get the usb device working, I also added pci and usb USE flags, the former defaulting to on, the latter to off.
Created attachment 221773 [details]
Updated ebuild, requires 2.6.32 kernel
This one is updated to Oliver's new commit thanks to which transfers of more than a few MB are actually working. Also fixes a memory leak. Requires 2.6.32 though.