This patch adds support for the extra keys on the Microsoft Natural Ergonomic Keyboard 4000 under Linux. It applies cleanly against v2.6.23-rc6, which was released last night.
It's nothing that exciting, just a rework of Li Yu's "hid-simple" patch from July. I'm not sure whether I will really use the now-activated keys either as they're spaced too far from my regular hand position. Git is awesome though.