Cognitive Style of PowerPoint
Hat tip to Zagula on Tufte's new book on bad PowerPoint presentations.
IMHO, blaming PowerPoint for bad presentations is a little like blaming Word for your essay not being Shakespearean. Or Outlook for long turgid email. Or MovableType for a boring blog.
The darn thing is a tool and you can really misuse it. No doubt about it. Kind of amazing how widely used the tool is though. Mentioned in Powell's book on his career in the military, in the Nasa analysis and of course essentially every school in America now uses for everything.