An excellent review of design. Just to name drop a tiny bit, I've worked with Marc a number of times. I learned a great deal from him about how people and technology interact. We met inj 1996 when Marc was head of design for a start up called Digital Knowledge Assets. DKA was developing software for helping experts share knowledge and that was something we wanted to have at Diamond. In retrospect, I see the work done at DKA as one of the precursors of what evolved into weblogs. Enough namedropping, go read what Marc has to say.