A couple of interesting conversations about Design Thinking are currently ongoing. The first, is a rather provocative article in ID magazine by Rick Poyner. ID magazine has traditionally been a reputable showcase for all things industrial design. Rick quotes people that I know out of context and twists the conversation into a self-serving self-promotion. But, the result is some good passionate discourse on the topic.
The second, is a Bruce Nussbaum blog post on that same article on the BusinessWeek site.
These may in fact help to frame design thinking for you, as this blog will be breaking out useful chunks of that knowledgebase in the coming weeks.