Gojko Adzic – 10 ways to screw up despite Scrum and XP:

"Henrik Kniberg, author of Scrum and Xp from the Trenches, talked today at Agile 2008 about the most common ways for teams to fail despite applying agile practices and tools. His presentation was organised as a talk about common problems and symptoms of those problems, with audience voting on what hurts them the most."