Even though I see more than my fair share of PowerPoint slides on a daily basis, I still like skimming through SlideShare to see what people have posted. I liked this presentation by Si Alhir that tries to explain Agile and Lean to people who have no background in it.
However, this presentation wouldn't work for every audience. Sure, the presentation is as comprehensive as it could be, given the medium, but some people don't need a comprehensive introduction. Instead, they need something with a very spare amount of content that they can use to convince people back at the ranch that Agile and Lean are worth further investigation. (Lean, perhaps?)
This presentation gets closer to reaching that objective. It's not necessarily the "Agile For Lean For Dummies" presentation, but the author probably wrote it with a different audience in mind.