The linusability project I launched recently, has caught the fancy of many people. There is a huge amount of discussion in the Linux Gazette forum called TAG. The IIT Delhi (my alma mater) Linux User Group has proposed to start a special wiki page for this topic.
I also stumbled on a few interesting sites. The most interesting one (for me) happens to be the one on ISO Standard 9241 related to usability. Google for it, and take a look.
There is a lot of work to do. I am happy.