It's hard to say just where Nancy Duarte has had the biggest impact: as the architect of Al Gore's presentation on climate change in An Inconvenient Truth... as the author of two profoundly powerful books on crafting and delivering presentations, slide:ology and Resonate... ...as the co-creator of Duarte Design, a firm that has been redefining the art and science of presentations for nearly a quarter-century... ...or as a pioneer in integrating social media and public speaking around the central driving idea of story. Our conversation lasts less than 10 minutes, but Nancy packs a lot of insight into how the backchannel changes the balance of power between speaker and audiencehow speeches can take on a life of their own as social objectshow even harsh criticism can make you a better speakerand how dramatic tension and release can lend your next speech the power and impact your ideas have been waiting for. Listen in - and then explore more deeply:Nancy Duarte on Twitter Duarte Design on the web, Facebook, Twitter, LinkedIn – and the Duarte blog SlideShare presentations by Nancy and Duarte DesignSteve Jobs' now-legendary commencement address at Stanford (video) (text)Duarte's new online store Diagrammer (imagine an iTunes for PowerPoint-format diagrams, tailored to the relationship you're illustrating and instantly downloadable for 99¢)Microsoft PowerPoint, which Nancy recommends for its outlining mode, as a way of clustering and refining your thoughts and crafting a compelling structurePrezi and Apple Keynote