GNOME HIG: 130 pages of fun
The usability guys working on GNOME released human interface guidelines, version 1.0. It has been long in the making, in its various guises. Back in 1998, gnome-gui-list was the battleground of much useless fighting over something that had a name but otherwise never got far: The GNOME Style Guide. But things have progressed. Serious effort by people who know what they are doing has helped a lot here, and without having read the finished document, I believe this thing might be worth something. It's time for application developers to make their stuff comply, if possible, with the contents of that document — usability, accessibility and consistency are all good things, and should be easier to achieve with the help of the HIG.
And I guess the group "application developers" includes me.