An interview with Kent Beck, father of "extreme programming" and Alan Cooper, most vocal proponent of interaction design go at it in Extreme Programming vs. Interaction Design.
Thanks, martha!
Samantha points out Tour The Wall Street Journal Online where they list they ways their redesign has improved the site. The first point of bragging: "Better Organized"
i.e. new and improved IA.
"Web users don't always have the same needs. So we've reorganized our navigation in a way that works better online. We've moved some sections and pages, and given some of them new names that more directly describe the subjects they cover. "