Straight From the Horse's Mouth: You Only See the Tip
http://www.boxesandarrows.com/view/straight-from-the26

Wodtke, Christina and Bill Wetherell
Boxes and Arrows
2007

Abstract:

Bill Wetherell talks with Tom Wailes about how one team at Yahoo! turned the normal design process on its head. Their thoughtful approach was successful, Wails posits, because they worked small and crafty while being inclusive in most useful ways.