http://jnd.org/dn.mss/human-centered_design_considered_harmf... and here:
http://www.jnd.org/dn.mss/hcd_harmful_a_clari.html
Highly recommended reading. I feel like it's a good sign that the community keeps re-inventing this. It means that it has some real legs. Another great example of our best practices slowly strangling good process.